livestick: add banner to osx script

deleted accidentally earlier
libcec: update to libcec-2.1.3.1
Merge pull request #2283 from chewitt/osx-livestick

livestick: add banner to osx script
service.openelec.settings: update to service.openelec.settings-0.1.18
CONTRIBUTING.md: ups. remove 'tests'
CONTRIBUTING.md: add link to search issues
CONTRIBUTING.md: add quick git howto
Merge pull request #2284 from klopsknoedel/master

libcec: update to libcec-2.1.3.1
transmission: remove global / per-torrent limits

people should now configure this via transmission web interface
busybox & busybox-initramfs: clean up fastboot