Assertion tests satisfying new trigsimp changes
Merge branch 'master' of git://github.com/sympy/sympy into issue694
Add several tests in part M
This is a complete rewrite of the geometric algebra module to more
efficiently use the capabilities of sympy.  This does not mean the new
module runs faster than the old (yet), but rather is simpler to understand
(the code) and to extend.
The new module includes a new section on vector manifolds and
examples, tests, documentation and a dependencies directory that allows
one to use and ansi console (enhanced printing) on Windows.
A complete description of the rewrite is in the html documentation.
All the tests pass and the examples run.
There are instructions in the documentation for installing all that is
needed to use the latex printing options.
Removed python modules not needed for current operation of GA.
Removed commented out development code in Vector.py
Corrected typo in documentation GA.rst
Removed dependecies directory.  Windows program required for enhanced
printing is referenced (url) in documentation installation instructions.
Moved examples for GA from sympy/sympy/GA/examples to sympy/examples/GA
Removed commented out code from development of manifold
Corrected imports in examples in GA.rst
Removed extra newlines in GA.py
Removed extra newlines and comments from end of modules in GA
Removed implicit imports from tests
Added function for combinations for python version 2.5 where it is not in
itertools.
Removed extra newlines from end of GA/tests/test_test.py
Removed duplicate examples directory from sympy/sympy/GA.  Only examples
directory is now sympy/examples/GA.
Removed implicit imports from all GA examples.
Changed names of examples to not include "test" in name.
Removed extra newlines at end of every example in sympy/examples/GA.
Removed final implicit imports from examples in sympy/examples/GA.
Removed latex printing for testing
Removed unneeded imports and changed GAPrint.py for testing purposes.
Fixed initialization of GA_Printer and corrected tests.