Fix showQuestion behaviour on answer of no: Now properly throws a
TipiBreakException again (that does not get wrapped in an
InvocationTargetException)
Implementation of events being fired from actions. Implemented
onYes/onNo for showQuestion & onError for callService actions. The
events being fired need to be defined inside the action that wants to
use it.

Also removal of unused TipiEventReporter
Merge branch 'master' into Navajo_issue_145
Updates to multi tenancy.