Add additional files to OTHER_FILES.
Merge pull request #35 from ahmedcharles/other_files

Add additional files to OTHER_FILES.
Merge pull request #34 from ahmedcharles/mac_target

Cleanup and explain TARGET difference for Mac.
Remove LIBLUA, since it's unnecessary.
Don't do 'unix' installs on the Mac.
Rearrange some variables in src.pro.
Restrict the unix areas to unix, without Mac.
Add Mac specific LIBS and install.
Remove unnecessary \ at end of line.