debug: typo of comment in example
remove unused rehash_inplace and related functions, imports, tests
correct namespace
remove -fopenmp for windows
debug: hash_internal.cpp:27:5: warning: this decimal constant is
unsigned only in ISO C90 [enabled by default]
debug: MurmurHash3.h:46:36: warning: 'retval' is used uninitialized in this
function [-Wuninitialized]