Big updates

- Extracted task configs into external files with load-grunt-config
- Removed the requirement to specify a CSS compiler
- Added support for LESS compilation
More updates

- Updated grunt build to create combined CSS and JS files
- Removed ".min" from CSS/JS extensions when on default grunt tasks
- Added grunt-contrib-concat
- Added grunt-contrib-cssmin
added LESS to grunt watch
added time-grunt
README updates