0.42.2 release

* Fix `SpaceAroundOperator` to allow newlines
* Fix `HexValidation` to ignore mid-word hex strings
* Fix `ColorVariable` to ignore color functions in variable declaration

0.42.1 release

* Fix `TrailingSemicolon` for variables with `!default` and `!global`.
* Check `!default` and `!global` variable declarations and `!optional` `@extend`
  directives in `BangFormat`

0.42.0 release

New Features

* Enhance Rake task to support command line flags
* Add `no_space` and `at_least_on_space` style options to `SpaceAfterComma`

Changes

* Improve `ColorVariable` to flag uses of rgb/rgba/hsl/hsla
* Return successful status code instead of 81 when all files matched by
  specified glob patterns are excluded by `--exclude` flags and `exclude`
  configuration settings, as it was confusing.

Bug Fixes

* Fix `SpaceAroundOperator` linter to not report false positives for operators
  in interpolation
* Improve performance of `ElsePlacement` linter to better handle large lists of
  `@if`/`@else if`/`@else` statements
* Fix `TrailingSemicolon` to report missing semicolons when trailing comment
  ended with a semicolon
* Fix `VariableForProperty` to not erroneously report property values with
  `!important`

0.41.0 release

New Features

* Add `DisableLinterReason` linter which enforces including a comment
  explaining why a linter was disabled via a control comment
* Add `SpaceAroundOperator` linter which enforces whitespace padding around
  mathematical operators
* Add `CleanFiles` reporter which displays all files that were free of lints
* Add flexbox properties to `recess` preset sort order
* Add flexbox properties to `smacss` ordering
* Add `TransitionAll` linter which reports the use of `transition: all`

Changes

* Improve `SingleLinePerSelector` to report selectors with descendent selectors
  on separate lines

Bug Fixes

* Fix `SpaceAfterVariableName` linter not being included in linter set
* Fix handling of consecutive control comments to properly disable linters
* Fix handling of control comments preceded by normal comments
* Fix `NestingDepth` linter not handling rules with no selectors
* Fix `MergeableSelector` messages to condense newlines
* Fix `UnnecessaryMantissa` to not report decimal values in quoted strings

0.40.1 release

* Fix regression where linters were enabled by default even if explicitly
  disabled in the default configuration

0.40.0 release

= New Features

* Add support for loading custom linters via the `plugin_directories` and
  `plugin_gems` configuration options (experimental)
* Add `ExtendDirective` linter which checks for any usage of the `@extend`
  directive.
* Add `TrailingWhitespace` linter which reports whitespace characters at the
  end of a line
* Add `SpaceAfterVariableName` linter which checks that there are no spaces
  between a variable name and a colon

= Changes

* Change `NameFormat` to no longer check placeholder names, as this is handled
  by the `SelectorFormat` linter
* Change `NestingDepth` to allow parent selectors to be ignored in depth count
  via the `ignore_parent_selectors` configuration option

= Bug Fixes

* Fix `ColorVariable` from crashing when variable interpolation occurs in
  multiline comments
* Fix `PropertySortOrder`'s `ignore_unspecified: false` behavior to not care
  about the relative order of unspecified properties at the end of a list of
  properties
* Fix `PropertyUnits` for properties that have multiple unit-like values (e.g.
  shorthand properties) and quoted values
* Fix control comment processing for `FinalNewline`, `SpaceBetweenParens`, and
  `TrailingNewline`
* Fix `ElsePlacement` to lint nested `@if` statements

0.39.0 release

= New Features

* Add `BemDepth` which checks the number of BEM elements is under a specified
  maximum

= Changes

* Load configuration file from user's home directory if one exists and no other
  configuration file is specified or in the current working directory
* Improve issue reporting instructions displayed when scss-lint crashes
* Remove `XML` formatter (see the
  [`Checkstyle` formatter](https://github.com/Sweetchuck/scss_lint_reporter_checkstyle)
  for an XML-based alternative)

= Bug Fixes

* Fix `Indentation` to not report `@import` directives spread across multiple
  lines
* Fix `Indentation` linter from crashing on `@else` statements with
  `allow_non_nested_indentation` set to `true`
* Update default configuration to work with projects using the
  [`syck`](https://github.com/indeyets/syck) YAML parser
* Fix `ColorKeyword` to not report lints for map keys with color keyword names

0.38.0 release

* Change configuration loading behavior so that defining lists in a custom
  configuration will completely override the old list instead of adding to it
* Fix `DeclarationOrder` linter to report lints for items within media queries
* Add `allowed_shorthands` option for `Shorthand` linter
* Add `allowed` option to `Comment` linter specifying regex of allowed
  multi-line comments, such as copyright notices
* Fix bug where control comments could filter out lints from other files
  depending on scan order
* Ignore `currentColor`, `inherit`, and `transparent` values in
  `VariableForProperty`
* Add `min_properties` option to `PropertySortOrder` to allow specifying a
  threshold number of properties that must be present before linting occurs
* Fix `PropertySortOrder` to lint sort order of nested properties
* Add `one_space_or_newline` `style` option to `SpaceAfterPropertyColon`
* Fix `ColorVariable` to ignore literal strings containing color keywords
* Rename `scss-lint` gem to `scss_lint` to follow RubyGems [best practices for
  naming gems](http://guides.rubygems.org/name-your-gem/). This only affects
  the name you use in `Gemfile`s or when you `gem install`; everything else
  remains the same.

0.37.0 release

* Rename `BEM` option on `SelectorFormat` to `strict_BEM` to emphasize that
  this is a particular dialect which may not be what developers expect
* Allow `SelectorFormat` convention explanations to be customized via the
  `#{type}_convention_explanation` and `convention_explanation` options
* Add `camel_case` and `snake_case` conventions to `NameFormat`
* Remove `BEM` convention from `NameFormat`, as it didn't make sense in this
  context since `NameFormat` does not deal with selectors
* Add support for function, mixin, or variable-specific conventions to
  `NameFormat`
* Add support for custom convention explanations to `NameFormat`

0.36.1 release

* Fix `PropertyUnits` to not error on properties with function call values
* Fix `DeclarationOrder` false positives on lines of the same type of node
* Fix `PropertyUnits` false positives on unicode escape sequences and string
  values that look like units
* Add additional units to default configuration for `PropertyUnits`, including
  durations, frequencies, angles, and resolutions