Tweak stuff so it uses select2's master branch.
Update to master branch.
Make it require the correct file.
version bump
Update require paths.
version bump [v3.4.10]
Have `rake update-select2` copy select2.{css,js} to select2-master.{css,js} so they can be loaded unambiguously.
select2 update.
Version bump [v3.4.12]
Typo.
Update select2.
version bump [v3.4.13]