Upgrade to The Offical LESS Compiler for Java (1.7.0.1.1)

Until there, we used a fork of the official less compiler for java:
https://github.com/sandroboehme/lesscss-java

But the maintainer of this fork has now joined the official project and have merged all his work on the official branch.

That's why I propose to switch to the official:
https://github.com/marceloverdijk/lesscss-java