Added *~ files to .gitignore
Added gpu_nodes.cfg
Fix ingore of "~" files.
Errors in red; other minor updates.
guppi_set_params: catch errors when determining username (fixes startup
problems).
ADC hist: check for gpu daq status also.
Add simple prog to unlock status shmem.
gitignore addition.
Fix locking sequence for gbtstatus updates.
guppi_utils: Keep track of shmem lock state.
gbtstatus_loop: release shmem lock on errors.
Merge branch 'master' into gpu_devel

Conflicts:
	.gitignore
	python/guppi_set_params.py
	src/Makefile