- update libpng to 1.6.1 for fb2png (big thanks to talustus for the huge help in cross compiling properly)
- merge and fix mikaelberthe commits (big thanks for all his support)
- clean up old prebuilt utilities/fb2png binary
- misc formatting fixes
- i9100/n7000 zip installer: option to skip flashing superuser using philz_installer.cfg