 capture_RPiHQ.cpp: add more args to saveImage.sh
 capture_RPiHQ.cpp: add more args to saveImage.sh

This required renaming some variables to be consistent with the ZWO version, and converting some from ASI_BOOL to bool.
Also fixed a bug in a call to cvPutText() and changed exit codes to closeUp().
Added some test code for SIGHUP and SIGUSR1 in preparation for telling the program to restart, versus stop, then start.
thomasjacquin/allsky,thomasjacquin/allsky,thomasjacquin/allsky