Added retrieve_lines processor
Return also line indexes (as a dict)
Added a local cache of remote servers objects
Switched console's servers list management to the new system
Load lines from the new system
Moved boxes to the new servers cache, added the uptime box and removed support in the console for the update status code
Removed update, updates and change_focus status code; also modified the command status code
Fixed that last output line was not sended
Merge pull request #4 from pietroalbini/rework-updates

Reworked updates