Update contributing file

* Remove notes on repo section
* Update hirearchy of coding standards sections

CONTRIBUTING.md

@@ -23,12 +23,6 @@ We only accept issues that are bug reports or feature requests. Bugs must be iso
 
 
 
-## Notes on the repo
-
-As of v2.0.0, Bootstrap's documentation is powered by Mustache templates and built via `make` before each commit and release. This was done to enable internationalization (translation) in a future release by uploading our strings to the [Twitter Translation Center](http://translate.twttr.com/). Any edits to the docs should be first done in the Mustache files and then recompiled into the HTML.
-
-
-
 ## Pull requests
 
 - Try to submit pull requests against the latest `*-wip` branch for easier merging
@@ -40,16 +34,16 @@ As of v2.0.0, Bootstrap's documentation is powered by Mustache templates and bui
 
 
 
-## Coding standards: HTML
+## Coding standards
+
+### HTML
 
 - Two spaces for indentation, never tabs
 - Double quotes only, never single quotes
 - Always use proper indentation
 - Use tags and elements appropriate for an HTML5 doctype (e.g., self-closing tags)
 
-
-
-## Coding standards: CSS
+### CSS
 
 - Adhere to the [Recess CSS property order](http://markdotto.com/2011/11/29/css-property-order/)
 - Multiple-line approach (one property and value per line)
@@ -58,9 +52,7 @@ As of v2.0.0, Bootstrap's documentation is powered by Mustache templates and bui
 - For multiple, comma-separated selectors, place each selector on it's own line
 - Attribute selectors, like `input[type="text"]` should always wrap the attribute's value in double quotes, for consistency and safety (see this [blog post on unquoted attribute values](http://mathiasbynens.be/notes/unquoted-attribute-values) that can lead to XSS attacks).
 
-
-
-## Coding standards: JS
+### JS
 
 - No semicolons
 - Comma first