Added setup.py.  python setup.py install now calls cmake and installs
python package csympy
Updated travis tests
Restored old travis tests and added new tests for PYTHON_INSTALL for
2.6, 2.7, 3.2, 3.3, 3.4
Set flags to do an "intree" build when testing 'python setup.py install'
untabified
overwrite build instead of build_py to ensure shared libraries built by
cmake get copied to proper locations for python install
Merge pull request #247 from pbrady/setup_pr

Added setup.py