Added a .travis.yml file to allow Travis CI to perform build tests
fixed some parts of travis yml
add explicit destination dir
Temporarily commented out tests during debugging
added ls /OpenMM/include to see what is happening with that
changed to home directory for OpenMM root
fixed ls directory error
set destination directory with cmake instead of make
uncommented make test
CPU, CUDA, and OpenCL platforms can now be built statically
PME Plugin can now be built statically
Also catch ValueError in _is_string. Fix indentation to be consistent (5 spaces
to 4 -- this would be a SyntaxError in Python3).
Fix linker issues for CPU platform on Windows
Merge pull request #307 from swails/fix_is_string

Fix bug in _is_string
Reference Amoeba and Drude static libraries can be built
Use static pthread_mt libraries when doing static builds on windows
Merge pull request #308 from swails/master

Improve usability of salt concentration in Amber custom GB forces
Merge pull request #309 from proteneer/static_build

Static build
changed to nosetests and commented out manual python tests
Merge pull request #296 from pgrinaway/master

[WIP] Travis CI yml
Add build status (travis) to readme.md