Merge https://github.com/less/less.js into rhino

Conflicts:
	test/css/comments.css
	test/less/comments.less
Merge https://github.com/less/less.js into rhino
Iterated string interpolation

Solves issue #2094 .
Cleaned up and added iteration for javascript too.
Merge branch 'iterated-interpolation-2094' of github.com:SomMeri/less-rhino.js into 2_0_0

Conflicts:
	lib/less/tree/quoted.js