Wrong parameters for RPC function init

According to the HomeMatic XML RPC specification, to unregister a server "interface_id" needs to be an empty string, not the URL. I currently don't have a CCU to test this. So please check, if the change works.
improves Classic UI compatibility of Firefox 15 and higher
Added some energy reading for Web Interface Queries (FritzOS < 6.0)
Added some energy reading for Web Interface Queries (FritzOS < 6.0) - removed TODOs
Added some energy reading for Web Interface Queries (FritzOS < 6.0) - final
Changed string comparisions accoring to style of openhab
Cleanup a bit - Removed some commented parts not used anymore.
Removed useless since comment.
Merge remote-tracking branch 'upstream/master'
Added -2 as valid priority level for Pushover messages. Pushovers API was updated 2014-05-27.
Nibe heat pump binding: Fixed issue after configuration update (close previous connection, before open new one).
Open energy monitor binding: Fixed issue after configuration update (close previous connection, before open new one).
Swegon ventilation binding: Fixed issue after configuration update (close previous connection, before open new one).
RFXCOM binding: Fixed issue after configuration update (close previous connection, before open new one).
Add extra reference for FGR221
Initial addition of zwave.me  ZME_WCD2
Add zwave.me WCD2 controller
Squeezebox bugs corrections (#1077 + #1082) + some cleaning
Merge pull request #1115 from cdjackson/zwave-products

[ZWave] Add extra reference for FGR221
Merge pull request #1113 from paulianttila/bug-fixes

Configuration update fixes to several bindings