added comonquery command-line tool.

added comonquery command-line tool.
added flush and clear commands to the beginning of each web entry point in
	controllers.py; I think this will help address the IntegrityErrors seen here
	and at PLE.
moved plccache to local functions to speed invocation of some calls (nodequery)
added several tags to bootman.py to help with new 3.0 BootManager issue.
moved bootman import in monitor/database/info/interface.py due to import
	error.  still need to investigate this
added extra RPM checks to node environment checks.  This isn't put in the db
	but the log files can be queried over time.