respect whether a job uses hibernate session or not
changed HashMap to ConcurrentHashMap

HashMaps are not thread-safe, however the maps are potentially modified
and read concurrently.
Merge pull request #16 from hojerst/master

Fixed concurrency issue in QuartzMonitorJobFactory
Re-package classes to remove the 'org' (in line with quartz) and implemented checking for session
Merge branch 'master' of github.com:jamescookie/quartz-monitor

Conflicts:
	src/java/org/grails/plugins/quartz/QuartzMonitorJobFactory.java
Merge branch 'master' of github.com:jamescookie/quartz-monitor into reschedule