Adding Python counterparts to the Invert params for Copy Rot and Copy Loc. I had to align the constants being used, so if you had files using those options (introduced after 2.43), you'll have to modify the INVERT settings for ROTLIKE constraints (didn't feel like making a minor version bump for this, if people thing otherwise, please say so). Based on a patch by Juho Vepsäläinen (bebraw)