Logging cleanup #13

Remove unnecessary m_list logs.
Player logs, always start with function name.
Makefile easier testing #13

make debug: clean up old omxd/omxplayer instances.
make ps: pstree -pu filtered for omx*
Fix for premature death of next primed track #13

For instance if it's a non-playable picture file.
Ignore SIGPIPE from dead omxplayers #13