Supply values for MOE_PYTHON_INCLUDE_DIR and MOE_PYTHON_LIBRARY
automatically
Merge pull request #412 from Rouslan/get_python_vars_from_interpreter

Supply Python vars to CMake automatically
adding hidetraceback where appropriate
scoping/calling logging hiding fixtures correctly
-fixing scoping issues in fixtures: previously T.class_setup style setup/teardown should've all
 been @classmethod. py.test doesn't even work without this setting (and it was very very fragile before)
-fixing function scoping issues in general (classmethod/staticmethod where appropriate)
Merge branch 'master' of github.com:yelp/MOE into sclark_36_testify_to_pytest