Merge pull request #8 from audioscience/master

Pulling in upstream
Merge pull request #9 from audioscience/master

Pulling in upstream
Fixing clang error caused by taking address of temp

See -Waddress-of-temporary
Converting string to c_str to pass to printf without error
Fixing error caused by taking reference of temp
Adding acmp to makefile
Fix Clang compiler error caused by address of temp
Merge pull request #39 from ajwlucas/master

Fixing compile errors on OS X with Clang