Before you start using Adm'in.2, here is a quick summary of how to use it
About LESS
Most of the CSS used to build Adm'in.2 is base on the LESS pre-processor.
This allows us to keep the code well organized. And it is also a way for you to only use the code you need: if you want to remove a plugin, you can just remove the @import rule in the adm-in-2.less file.
If you want to use your own pre-processor, feel free to fork the project to adapt it!
About Sublime Text
As we use Sublime Text every day, it has become simple to offer you the project file, which contains some Build Systems so that you can easily compile the LESS files.
If you feel like using it with an other editor, feel free to do so! And if you share the tool you use to build it, that's even better!
About Gulp
Gulp is a great tool (based on Node.js) to compile and minify all the files. It also watches them so that when you make a change in a LESS or JS file it re-builds (e.g. compile and/or minify) what's necessary.
If you use Gulp, you won't need to use the Sublime Text build system, as Gulp also minifies the JS files and watches any changes in the LESS and JS files.