New release : Jack 0.103.0

Changes:
Fixed broken --disable-freebob config option.
Jack now reads the global config file.
Fix for jack_midiseq.
For for HPET code to use 32-bit reads on all platforms, for atomicity reasons.
Directly accessing Jack port internal structure is forbidden.
Minor fixes for midi support.
Fix for freebob driver crash.
Fix for alsa usb interleave_skip handling.
Fix for memory leak in ringbuffer.
Fix for shutdown segfault fix.
Added -lpthread to jack.pc so that clients which don't use pthreads will still get -lpthread in their link step.
New parameters for freebob driver. Check help for details.
Jack clients now discover Jack tmpdir at runtime.
Removed code that was causing divide-by-zero errors.
Fixed configure.ac errors involved in testing for clock_gettime().