add contributing section

README.md

@@ -5,7 +5,7 @@ min
 
 a tiny framework that makes websites pretty
 
-Written in LESS, compiled to CSS. Access the current beta [here](http://minfwk.com/beta.html). The "beta" page hotlinks the latest version of the Min LESS files.
+Written in LESS and Sass, compiled to CSS. Access the current beta [here](http://minfwk.com/beta.html). The "beta" page hotlinks the latest version of the Min LESS files.
 
 To download Min, go [here](http://minfwk.com/download.html).
 
@@ -20,6 +20,30 @@ Of course, modern browsers give you pretty transitions.
 ###License
 MIT licensed.
 
+###Contributing
+
+We encourage you to contribute anything you can to Min. If you have an idea for a new feature, open a new issue with the Enhancement tag.
+
+To contribute code:
+
+1. Fork Min.
+2. At this point, you can choose between editing the Sass files in the `sass` folder or the LESS files in the `less` folder. Feel free to edit one but ignore the other; [Scott O'Hara](https://github.com/scottaohara), the Sass version maintainer, will translate your changes to Sass from LESS or vice versa.
+3. Make sure that your pull request will not bring Min's total size above 995 bytes minified and gzipped.
+4. Make a pull request with your changes. In your pull request, you MUST:
+ - State the size of the entire Min framework before AND after your changes (run build.sh on your changed files, gzip entireframework.min.css and measure its size)
+ - Say why you made these changes
+ - Describe any possible issues with the changes, or reasons why they might not be merged
+ - If your changes affect Min's appearance, take screenshots of the affected Min; if you can, include multiple browsers using [Browserstack](http://www.browserstack.com/screenshots).
+5. Finally, remember:
+ - The :star2: special files :star2: are only updated by the project founder, Owen Versteeg, and they are only updated after extensive compatibility, size, and bug testing. They are built by the `build.sh` file. NEVER MODIFY ANY OF THE :star2: special files :star2:, which are:
+   - CNAME
+    - compiledcss.js
+    - entireframework.min.css
+    - mingziphotlink.php
+ - Min uses tabs, all lowercase, and proper spacing. If your PR contains wacky spacing changes it'll probably be rejected.
+ - Don't skimp on spaces to save space; the YUI compressor does this automatically at build time.
+ - Contributing to Min is highly encouraged. Don't be shy!
+
 ###Building the latest Min
 
 WARNING! This will build the latest, pre-release version of Min. It may be broken. If you want to use an already-built Min, it's available in the file entireframework.min.css as well as through the [downloads page](http://minfwk.com/download.html).