Merge pull request openhab#2540 from J-N-K/fix-fritzbox-exception

Fix issue openhab#1845

prepare for 1.6.2 release

additional fix for openhab#1758

start the broadcasters lifecyle management manually, thanks to

@digitaldaniel for the tip

prepare for 1.5.0 release

prepare for 1.4.0 release

removed dropbox add-on