Move docs from gh-pages to docs/ directory (palantir#1494)

* Ignore docs directory when publishing to npm

* Add all docs content from gh-pages branch to docs/ directory

* Update docs on docs

* Update docs build script

.npmignore

@@ -14,6 +14,7 @@ circle.yml
 Gruntfile.js
 tslint.json
 /build/
+/docs/
 /src/
 /test/
 tscommand*.txt

docs/Gemfile

@@ -0,0 +1,3 @@
+ruby '2.2.3'
+source 'https://rubygems.org'
+gem 'github-pages'

docs/_config.yml

@@ -0,0 +1,20 @@
+# Site settings
+title: TSLint
+email: [email protected]
+description: > # this means to ignore newlines until "baseurl:"
+  TSLint documentation. A linter for the TypeScript language.
+baseurl: "/tslint" # the subpath of your site, e.g. /blog/
+url: "https://palantir.github.io/" # the base hostname & protocol for your site
+twitter_username: PalantirTech
+github_username:  palantir/tslint
+
+# Build settings
+markdown: kramdown
+markdown_ext: md
+exclude: [vendor]
+
+page_gen:
+  - data: rules
+    template: rule
+    name: ruleName
+    dir: rules

docs/_data/develop_sidebar.json

@@ -0,0 +1,26 @@
+{
+   "title": "Develop",
+   "url": "/develop",
+   "links": [
+      {
+         "title": "Custom Rules",
+         "url": "/custom-rules/"
+      },
+      {
+         "title": "Custom Formatters",
+         "url": "/custom-formatters/"
+      },
+      {
+         "title": "Contributing",
+         "url": "/contributing/"
+      },
+      {
+         "title": "Docs Development",
+         "url": "/docs/"
+      },
+      {
+          "title": "Testing Rules",
+          "url": "/testing-rules"
+      }
+   ]
+}