Fill in enough of BridgeDevice to expose AllJoyn devices from the adapter over the network.

There seems to be a bug in alljoyn core that prevents us from registering the callback. I
have the callback implemented, but the actual registration is commented out for now until
we resolve.

Without this, libxml errors go to stdout.

Expose AllJoyn devices

Fix more build problems

Change AllJoynHelper to use a vector<uint8_t> instead of vector<bool> when setting ajn::MsgArg, since vector<bool> is a specialization that doesn't allow us to access the underlying array.

Fix unused parameter and variable warnings, plus no return value in void function warnings (due to DSB_ASSERT() only working on Apple platforms).

ConfigManager, Bridge, and Makefile improvements