Update DT extensions to match DT v1.10.2

I was experiencing this bug: https://datatables.net/forums/discussion/21220/after-updating-datatables-and-colreorder-typeerror-g-aocolumns-a-aasorting-f-0-is-undefined

It turns out that ColReorder needed to be updated to play nicely with DataTables v1.10.2. In particular, I seemed to need this change to ColReorder: https://github.com/DataTables/ColReorder/commit/fddf7019fd9c40e7a82a8a3cdb6cd42764e6d02a

This pull-request contains 4 commits. These commits were created by downloading the latest (as of 2014-08-13) stable package of DataTables from here: http://datatables.net/releases/DataTables-1.10.2.zip

- Commit 70136b7: Only updates ColReorder from v1.1.1 to v1.1.2. This change corrected the bug above for me. All of the rest of the commits are icing on the cake that you may (or may not) also want.
- Commit aa730b3: Updates the rest of the extensions to match the DataTables stable package.
- Commit 443d5ec: I noticed that there were also a number of stylesheet changes that, apparently, were missed from your last update of DataTables. I carefully followed your patterns (changing *.css, to *.css.scss; changing url() to image-url(); etc.) and updated the stylesheets from the stable package.
- Commit c2073e9: Updated the gem version number from v2.2.1 to v2.2.2.