Microphone devices now properly reacquire when lost

1.) Audio devices initialized with WASAPI (MMDeviceAudioSource) now
properly attempt to reacquire every 2 seconds after device has been
unplugged.

This particular issue really shouldn't have taken this long to have been
resolved, please make things like this a higher priority next time (I'm
looking at you Jim.  ..or, I'm looking at myself, rather)

To all users who have been afflicted by this issue for a long time, I
sincerely apologize.

2.) Made String::Compare and String::operator== and != use 'bool'
instead of BOOL for return values (this isn't the 90's anymore)
Merge branch 'master' of https://github.com/jp9000/OBS