Added log events to record cache hits and misses.
Supports performance troubleshooting for CMS @ ND.
Use kLogDebug rather than kLogNormal
Install bash_completion.d relative to installation prefix.
Merge branch 'log_cache_hit_miss' of git://github.com/cooperative-computing-lab/cvmfs into cooperative-computing-lab-log_cache_hit_miss

Conflicts:
	cvmfs/CMakeLists.txt
Merge branch 'cooperative-computing-lab-log_cache_hit_miss' into devel