Updated WiFi signal icons from KitKat
Updated mobile signal icons from KitKat
Updated Bluetooth icons from KitKat
Added coloring support to airplane mode icon
update italian translation to 2.7.1

update italian translation to 2.7.1
Merge pull request #269 from pitone02/patch-13

update italian translation to 2.7.1
Transparency management settings revamped
- grouped and moved to the root of the settings hierarchy (right below
statusbar and navbar tweaks)
- navbar transparency independent of "override system defaults" navbar
setting
- Transparency manager allows 4 modes:
--- 1) Disabled - completely disabled
--- 2) Statusbar only
--- 3) Navbar only
--- 4) Both
Added switch for enabling/disabling navigation bar colors