* Small Makefile changes.

* Removed a couple files that were not being used.
* Cleanups found with clang's -Weverything (and shutting it up about a
lot of things that were ridiculous, as well as ignoring some of the
warnings still coming up).
This should've never got committed as it was, oops.
Trying to get git to ignore changes I make to common.props in the future (have to be able to change it to build the DLLs).