Update gruntfile and package.json to compliance with grunt 0.4.x
gitignore: added .DS_Store
Fixed a couple of errors in the methods definition
Added my own IDE filed in the .gitignore file
namespaced events instead of caching callbacks
Pass container width to draggable instance. Relative to 5569caa687
Reverting some changes in commit 6302b98

Check to avoid generation of duplicated stylesheet-tags shouldn't have
been removed from Gridster. It's useful when calling multiple times 
`generate_stylesheet` method once Gridster is initializated. We use it
at ducksboard to generate a TVmode version of the grid with bigger widgets.

Refactored the way stylesheet tags are removed. When created I push them 
to a jQuery collection which is removed when `destroy` method is executed.
Removed `libs` folder from the repo. Install dependencies with bower.
bump up to jQuery 2.0 and start using bower for managing dependencies
Ignore libs folder
Added watch command to Gruntfile config
gridster/fix: using comparators in sort methods.

Sort method by default orders alphabetically, but we are sorting numbers
and this means that: 40 < 6. And we not expect this result.
drag/touch: don't prevent default when start dragging in touch device
updated diet