Initial copy of 2.9.4 patches to 2.9.5.
Unified patches for 2.9.5
Reworked library building & linking.
Cleaning up the architectural hooks. Patching a kicad bug that -debug complains about at launch time.
Switching wx default back to 2.9.4.
Added kicad branch selection hooks to switch more easily between variants.
Removed a few commented lines, fixed indentations
Removed patch for the pns router (it is already applied in the code repository)
Removed KICAD_TESTING_VERSION cmake flag
Merged. Reverted default version of wxWidgets to 2.9.4