This will allow the android client to directly make calls to the mpd process to change tracks
I went with camel case on the function names here, if you use an underscore
javac generates a function tht looks like this:
JNIEXPORT void JNICALL Java_org_musicpd_Bridge_play_1previous
I figured what we ended up with looks a little nicer:
JNIEXPORT void JNICALL Java_org_musicpd_Bridge_playPrevious
e086f09d48