Merge pull request #836 from ctweney/rails-3.2.13-master

CLC-1508 Master branch Update to Rails 3.2.13
CLC-1179 Redo Sakai Sites proxy API to match CalCentral needs
Preparation for sharing formatted site data between My Activities, My Classes, & My Groups
CLC-1179 Add Sakai Announcements to My Activity
No changes to front-end code yet, & so the resulting UX does not match the newest design
CLC-1179 Fix My Activities front-end display
- Clump by day rather than by second
- Preserve ordering within the clump
- Add "Announcements" text
CLC-1179 Code format change
Merge pull request #832 from raydavis/raywip

CLC-1179 Add Sakai Announcements to My Activities
CLC-1373 Crude trial of talking to Bearfacts API in code
CLC-1373 Fooling around with Bearfacts API
CLC-1373 Reduce duplication
CLC-1422 Talk to Bearfacts regblocks endpoint and provide VCR recording of Oski's data
CLC-1422 Give BearfactsRegblocksProxy an expiration time
CLC-1422 Look up student ID based on LDAP ID and send that to Bearfacts
CLC-1422 Don't try to convert XML to JSON when timeshifting; cache Bearfacts response as String since Nokogiri::XML isn't serializable
CLC-1422 Append regblocks to MyActivities feed when available