Update filter_obyfile.pl to handle patchdata and some more alias cases.

Update static_dependencies.pl to handle dlls with interesting version numbers (e.g. backend.dll)

filter_obyfile.pl now handles deletions including ECOM plugins and aliases rom_content.csv asks for bluetooth.dll to be removed, which kills 137 executables so far, but not quite enough!

Add first version of tools\filter_obyfile.pl, which uses rom_content.csv to select "stem_" versions of files. Updated rom_content.csv to request the stem_ versions of the startup resource files