Bug fix: loop on exit

fallback loop and multiple files working for regular omxplayer

Check nativeLoop flag when using loop and multiple files

If process is still running after stop() has been called, a SIGTERM

signal is sent to it.

events, videoDir and videoSuffix

Now emits events
New method: getStatus()
New method: setVideoDir(dir)
New method: setVideoSuffix(suffix)

First working version