Modularize internals.
Rename to ReMake & add QtCreator project.
Clarify usage.
Add add_compile_flags shorthand.
Add set_internal shorthand.
Add target_{WINDOWS,MACOSX,LINUX,UNIX}_{SOURCES,LIBS}.
Add target_{COMPILE_FLAGS,INCLUDES}.
Cleanup.
Fix M{32,64}.
Be specific.
Add legalese.