resolves #964
Merge pull request #1449 from jonschlinkert/master

resolves #964
Normalize URLs in generated CSS

Adds a normalizePath method to tree.evalEnv.prototype with which to normalize paths, i.e. , remove /../ or /./ segments stuck in the middle.

Unit tests have been updated to reflect these changes.
Merge branch 'normalized-urls' of https://github.com/rjgotten/less.js into 1.5.0-wip

Conflicts:
	test/css/static-urls/urls.css
	test/css/urls.css
Fix browser tests after removing .. path elements