Merge pull request rantly-rb#73 from Ana06/2-0-0

Prepare version 2.0.0

Merge pull request rantly-rb#51 from Ana06/error-gemspec

Fix README name in gemspec to release Rantly

Tagged as version 1.1.0 for release to RubyGems.

Improved
- Include failed example and number of example run in failure message.
  - Issue rantly-rb#21
  - thanks [Ana María Martínez Gómez][Ana María Martínez Gómez]
- Improve run-time for generation of strings.
  - Issue rantly-rb#19

Tagged as version 1.0.0 for release to RubyGems.

Added
- Trying harder to shrink collections instead of giving up on first success of property (thanks [Eric Bischoff][Eric Bischoff]).
- Added convenience classes Deflating and Tuple for more control on shrinking (thanks [Eric Bischoff][Eric Bischoff]).
- Added usage examples for Deflating and Tuple shrinking strategies (thanks [Oleksii Fedorov][Oleksii Fedorov]).
- `Property#check` will now use the `RANTLY_COUNT` environment variable to control the number of values generated (thanks [Jamie English][Jamie English]).

Major changes
- Array shrink was removed in favor of Tuple and Deflating.

tagged 0.3.2

- consult CHANGELOG.md for changes between 0.3.1 - 0.3.2
- this includes unreleased additions/changes from hayeah/rantly
  specifically the shrink functionality

tagged 0.3.1

- based on when this version was pushed to
  rubygems.org (2011-12-15)
- useful for comparison with later releases