isight-firmware-tools-1.6-bp153.1.15

- Cleanup spec file with spec-cleaner
- Use udev macros from systemd-rpm-macros
- Update info rules
- Add gpg signature
- Use url for source

-  isight-ft-udev.patch: detect the udev directories
  at compile time.

- own udev directories to avoid udev build dependency

- Added support for older iMac isight

- Version bump to version 1.6

- packaged isight-firmware-tools version 1.4.2 using the buildservice spec file wizard