Break circular dependency on the cogserver

This should fix bug #530  I beleive.
Break cyclic depdendency in python - bug #530

Try to make python not depend on the cogserver.
Should fix bug #530.
Fix some out-of-order initialization steps
Hack around out-of-order python initialization

The sequence in which the python code is intializing
itself seems to be done in some unexpected way.  Delay
initialization until python is actually needed. Don't
initialize it at all if it is never actually used.
oops, last round of changes removed important check
Merge pull request #617 from linas/deserv

Unclog circular dependency in the cython code