Updating to version 3.3.0 select2
Merge pull request #27 from kbessiere/master

Update select 2 to version 3.3.0
Fixed gem version number
Merge pull request #29 from javiercr/master

FIxed gem version number
Use image-url for proper asset pipeline lookup. [Fix #31]
Change sass-rails dependency to a >=
Move vendor/assets -> app/assets for rails 4
s/vendor/app/ in thor tasks
Merge pull request #34 from freerunningtechnologies/rails-4

Rails 4 support
Fix name of spinner.gif in update-select2
bump select2 version to 3.3.1
Merge pull request #35 from freerunningtechnologies/rails-4

Fix image filename of spinner.gif in thor task and update to select2 v3.3.1
Remove version 3.2 specific reference.
Merge pull request #37 from sodabrew/patch-1

Remove version 3.2 specific reference.
keep a hash of selected ids for performance of large datasets
merge