MozStumbler v0.16.0

* Resume Wi-Fi scan after Wi-Fi is turned on (issue #477) (@illarionov)
* Update Spanish translations (@stripTM)
* Block Madrid transportation bus SSID (@stripTM)
* Execute all reporter code in LooperThread (@illarionov)
* Display the number of unique cells (issue #320) (@illarionov)
* Fixes to communicator package (@tamcap, @illarionov)
* New position of Start Scanning button in landscape mode (@tamcap)
* Refactored network communication code into a separate package (@tamcap)
* Only show dialog to enable GPS on program launch (@aaronaxvig)
* Fix scanner service race condition; Add stop scanning button to notification (@tamcap)
* Block Triangle Transit on-bus public Wi-Fi (@tamcap)
* Set upload dialog background to "light" (@tamcap)