Fixed issue cloudhead/less.js#1272

Local path should now work correctly.
Merge pull request #1273 from losnir/master

Fix for local paths
Updates to CONTRIBUTING.md. Emphasises that users should wrap words with `@` signs in backticks to avoid sending notifications to any GitHub user that might have that username.
Fix for local paths with Unix / Windows Support

Second try at fixing issue #1272, now with added Unix support.
Merge pull request #1277 from jonschlinkert/master

contributing.md updates. Fellow nerds! please wrap words with `@` signs in backticks!
Fix courtesty typo
Merge pull request #1278 from losnir/master

Better fix for local path (cross-platform)
Make non strict units less strict and change the default to not be strict units. Fixes #1254
Follow standard for inheriting from Error
Remove ecma-5 since it is outdated. Fixes #1279
extends recognise attributes. Fixes #1295
Add isunit function. fixes #1298
Fix browser tests