Haxelib commands

[ncannasse]

I think that the haxelib command list documentation could be made much more readable
Currently we have http://preview.lib.haxe.org/documentation/using-haxelib

We could present each "command" with a description, a bit longer than it is right now and an usage example. By using a bold+color for the command it will make it more easy to find the one that you're looking for (similar to "CLI command" section on https://docs.npmjs.com/)