Rework of the LSTM math frame so that we see everything and it doesn't look like a giant wall of text.

The extra expressions have nothing to do with the example and just confuse the reader.  Also I've actually added the compile step which was missing from the example code.

Crash fix and change scan.allow_gc default.

Small crash fix when cxx=icpc

Fix tests that cause error in the daily buildbot.

Change the ModuleCache to only take the lock for actual compilation.

Fix tests

Added missing import for ShapeError exception.

disable MRG_RandomStreams warning that it can't guess the number of stream. There is no explaination how to do this and confuse people.