swap out jsCSSp for LESS parser - faster, and deals with LESS files
swap jscssp for LESS in menu js as well
fix for handling of LESS variable nodes
skip single-line comments in the output, so that LESS files can still be commented without interfering
force reload when recompiling sheets - otherwise LESS reloads from browser object cache
do not render CSS files as less to avoid incorrect parsing of @import directives for the rendered sheet
do not render the parsed CSS back to blocks. unnecessary, and not possible in parsed CSS languages since each sheet is loaded separately, without any imports
some comment nodes may be returned as structured data
Merge branch 'gh-pages' into less-compiler

Conflicts:
	js/views/style/menu.js
	js/views/style/page.js
why cant all these parsers just get along?
update LESS to latest version
split parsing behaviour up into separate codepaths depending on selected processor
added config file option for processor engine, improve readability