New, improved unit test.
Merge pull request #625 from linas/multi

New, improved multi-atomspace unit test.
Rationalize the logger class
Cleanup the classserver class
misc defered cython maintenance
Merge pull request #626 from linas/cyth

Misc deferred cython maintenance
Add a cython finder
Look for a given version of cython
Simplify the cmake files
More cmake cleanup
synchronize with master sources in link-grammar
Additional cython deferred maintenance
whoops, missed a spot with the test cases
Merge pull request #627 from linas/cb

More deferred cython maintenance and cleanup
Arghhh. One more spot