added "Conventions" section. Issue cdnjs#652

Author: Lockyc

README.md

@@ -1,6 +1,5 @@
 <a href="http://travis-ci.org/cdnjs/cdnjs"><img src="https://secure.travis-ci.org/cdnjs/cdnjs.png" alt="Build Status" style="max-width:100%;"></a>
 
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 # cdnJS Script Repository
 
 The repository mirroring all scripts on cdnjs.cloudflare.com, created and maintained by [Thomas Davis](https://twitter.com/neutralthoughts), [Ryan Kirkman](https://twitter.com/ryan_kirkman) and [Lachlan Collins](http://plus.google.com/116251728973496544370?prsrc=3)
@@ -12,6 +11,12 @@ __Libraries must have notable popularity. 100 watchers on GitHub is a good examp
 
 [Extensions, Plugins, Resources](https://github.com/cdnjs/cdnjs/wiki/Extensions%2C-Plugins%2C-Resources)
 
+## Conventions
+
+* Filenames should **not** include version number and be **lowercase**
+* Javascript & Css files should be minified, If the library doesn't already provide a minified version, our preferred minifier is [UglifyJS](http://marijnhaverbeke.nl/uglifyjs "UglifyJS")
+* If updating an existing library, try to keep consistant with the existing structure
+
 ## Pull requests steps
 
 1. Fork this repository
@@ -32,5 +37,3 @@ __Libraries must have notable popularity. 100 watchers on GitHub is a good examp
 ## Running the validator
 1. Install all the needed dependencies locally (you will need `node`): `npm install`
 2. Run the test suite: `npm test`
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