options updates
Merge remote-tracking branch 'refs/remotes/origin/master' into refactor

Conflicts:
	Gruntfile.js
	README.md
	package.json
	tasks/less.js
	tasks/lib/comment.js
	test/less/main.less
	test/less/main2.less
	test/less/winter/theme.less
update utilities to be mixins for testing `@import (reference)` directive
add `import` feature
updating to allow passing in imports to add to the top of the less files
fixing grunt test
add missing require('fs') statement
move bootstrap.yml to test folder
organize options in less.js, move function out of for loop
major updates to variables to automatically calculate relative paths, be more flexible
add lib.js
add test files
add lodash dep, add targets to Gruntfile for testing
merge new options.imports feature into main branch
Merge commit '3aebbd6169a245e481056dab12b13c0393ee0dd4'
Merge branch 'refs/heads/refactor'
use vendor dir for bootstrap
- Cleaned up a lot of the Gruntfile. Examples are more clear.
    - New "import" option for prepending import statements to compiled less files.
    - New "banner" option for adding banners to generated CSS files.