This may have been the cause of bug #69. Removed the wait-for-shutdown
code in DroidtoothPlugin that was added to attempt to avoid that bug.

This may have been the cause of Bluetooth not always being disabled at
shutdown on the Sony Xperia Tipo.

This should enable us to connect to contacts faster at startup and
whenever a new means of connecting becomes available.

We can get all the information we need from the other status messages.

The variable now wasn't being updated when no devices were discovered.

Dev task #80.

Very important stuff.

- this will be useful later for e.g. auto-disabling Tor

There's currently no way to set this setting, so the bug isn't fixed.

Of course, not all devices support Bluetooth...

Direct P2P connections between mobile devices are unlikely to work, and
they'd expose the social graph to surveillance.

Note that some devices (I'm looking at you, Huawei U8110) misreport
connectivity by failing to set EXTRA_NO_CONNECTIVITY and returning true
from ConnectivityManager.getActiveNetworkInfo().isConnected() when
there's no connectivity.