Dev environment:force indentation to 2 spaces. Added new grunt module, grunt-leading-indent to check space consistency, and modified jshint options to enforce 2 spaces
Merge pull request #120 from juliandescottes/add-grunt-leading-indent

Dev environment:force indentation to 2 spaces.
Merge from master + added more jshint checks (undef and latedef). Very helpful to catch post merge issues.