Move all source files to `src`
Update build files for new `src` directory
Update OS X settings as well
Old build settings will not work now, put them on the side.
resolved incompatible pointer types from issue 32
Merge branch 'src' of github.com:TuckermanGroup/PINY into src
Merge pull request #41 from TuckermanGroup/src

Put source files in a separate `src` directory.