Fix some subtle sql storage bugs
Fix double delete bug.
wtf. Gustavo wrote none of this, but boilerplate.

Hmm I wrote everything in here, except the boilerplate,
which had Gustavo's name in it, due to cut-n-paste. All this
is my code and my code alone.  So there.
Start work on a new, extended test case
Continue work on PersistUTest.cxxtest
Fix bug with SQL persistance
More work on the perisstance unit test
Final version of PersistUTest
AtomSpace can't be const.

Get's may not leave the atomspace constant, if its attached
to some other cogserver or to persistant storage.
More const'ness fixes
Work around a bug I don't understand
Comment out the persistance tests
Merge pull request #430 from linas/master

Large raft of persistence fixes