Reimplemented getBusy using
https://developers.google.com/google-apps/calendar/v3/reference/freebusy/query
so timeslots with state "available" won't show up in the results
Merge branch 'master' into GoogleCalendarAgentFreeBusy

Conflicts:
	java/eve-planning/src/main/java/com/almende/eve/agent/google/GoogleCalendarAgent.java