[Building Sakai] Session Replication work

[John Bush]

This work is probably a little late for the Sakai 10 cutoff, its just
entering early testing.   But I'd like to at least advertise it, in
case others are interested in helping to test, or review the design,
or whatever.

This has been a long standing Sakai issue for awhile.  Unicon did some
great work back in 2008 to begin addressing it.  I'm dusting that work
off and attempting to solve it a slightly different way.

Please check out https://jira.sakaiproject.org/browse/SAK-25440

For a video demo:  http://screencast.com/t/LXG2EyAZ

Feedback welcome.

-- 
John Bush
602-490-0470

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