Update to less 1.7.0
Preparing release 1.2
Back to development: 1.3
Reimplement server-side compilation, works with cached resources now.

Instead of getting the location of a less file to be rendered we now
get its content and pipe it to the lessc command.
Merge branch 'master' of github.com:seppeljordan/collective.lesscss

Conflicts:
	src/collective/lesscss/browser/compiledcss.py