Remove sodipodi from core parts

[KjellMorgenstern]

splitString() in fritzing-app has a TODO : We should just clean sodipodi from core parts,
so we don't need to run this step for those:

	// get rid of inkscape stuff too
	TextUtils::cleanSodipodi(contents);

There are still 1926 lines in fritzing parts containing sodipodi:

 find -type f | grep svg | xargs -I{} grep "{}" -e sodipodi | wc
   1926   15517  34869

1. Add add a checker to our CI, that alerts and fixes sodipodi
2. Run the fix on all core parts, update them
3. Check if core part before calling cleanSodipodi