[IMP-dev] Define internal namespace in imp_module.py

[Daniel Russel <drussel@gmail.com>]

Move the definition of the core::internal namespace to imp_module.py.  
Now all modules have a uniform internal namespace called  
modulename::internal to go along with the internal include directory.

Attachment: internal
Description: Binary data

There are lots of extra includes of macros.h in core due to it being  
defined elsewhere before, but  those can wait.