photo_strip_smite_builder now deletes individual image files if they exist

Cleanup on aisle UI:

-Removed a bunch of commented blocks of code
-Replaced calls to malloc and friends with calls to g_malloc and friends
-Tied module load/unload to the Photo booth start/stop functions. This has the effect of 1) actually making those buttons do something, 2) Making the program start faster, 3) making the config dialog behave more smoothly, 4) streamlining the starting/stoping of modules in the event of things like the trigger not being plugged in/Gnome stealing the lock on the camera
-Remove the load module button on the config dialog. Starting/stopping the photo booth is the official way to start/stop modules