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

Warning fixes

The loop was:

~DeviceSystemBridge()
Shutdown()
ShutdownInternal()
RegisterAdapterSignalHandlers()
~DeviceSystemBridge()

g_Instance seemed to be used to prevent the DeviceSystemBridge from going out of scope while the adapter listener was still alive. I handled this by notifying the listener in the bridge's destructor.

When make clean is run, remove the built program, top-level *.o files, and ignore the built program in git.

Fix warnings by removing or using unused variables, initializing a variable, and turning off unfixable warnings.