Port over CONTRIBUTING guide

Author: mattrobenolt

CONTRIBUTING.md

@@ -0,0 +1,90 @@
+# Contributing
+
+## Setting up an Environment
+
+To run the test suite and run our code linter, node.js and npm are required. If you don't have node installed, [get it here](http://nodejs.org/download/) first.
+
+Installing all other dependencies is as simple as:
+
+```bash
+$ npm install
+```
+
+And if you don't have [Grunt](http://gruntjs.com/) already, feel free to install that globally:
+
+```bash
+$ npm install -g grunt-cli
+```
+
+## Running the Test Suite
+
+The test suite is powered by [Mocha](http://visionmedia.github.com/mocha/) and can both run from the command line or in the browser.
+
+From the command line:
+
+```bash
+$ grunt test
+```
+
+From your browser:
+
+```bash
+$ grunt run:test
+```
+
+Then visit: http://localhost:8000/test/
+
+## Compiling Raven.js
+
+The simplest way to compile your own version of Raven.js is with the supplied grunt command:
+
+```bash
+$ grunt build
+```
+
+By default, this will compile raven.js and all of the included plugins.
+
+If you only want to compile the core raven.js:
+
+```bash
+$ grunt build.core
+```
+
+Files are compiled into `build/`.
+
+## Contributing Back Code
+
+Please, send over suggestions and bug fixes in the form of pull requests on [GitHub](https://github.com/getsentry/raven-js). Any nontrivial fixes/features should include tests.
+Do not include any changes to the `dist/` folder or bump version numbers yourself.
+
+## Documentation
+
+The documentation is written using [reStructuredText](http://en.wikipedia.org/wiki/ReStructuredText), and compiled using [Sphinx](http://sphinx-doc.org/). If you don't have Sphinx installed, you can do it using following command (assuming you have Python already installed in your system):
+
+```bash
+$ pip install sphinx
+```
+
+Documentation can be then compiled by running:
+
+```bash
+$ make docs
+```
+
+Afterwards you can view it in your browser by running following command and than pointing your browser to http://127.0.0.1:8000/:
+
+```bash
+$ grunt run:docs
+```
+
+## Releasing New Version
+
+* Bump version numbers in both `package.json` and `bower.json`.
+* `$ grunt dist` This will compile a new version and update it in the `dist/` folder.
+* Confirm that build was fine, etc.
+* Commit new version, create a tag. Push to GitHub.
+* `$ grunt publish` to recompile all plugins and all permutations and upload to S3.
+* `$ npm publish` to push to npm.
+* Confirm that the new version exists behind `cdn.ravenjs.com`
+* Update version in the `gh-pages` branch specifically for http://ravenjs.com/.
+* glhf