Merge branch 'hotfix_1.4.4'
update changelog
update: add requester info to event and answer post callbacks
Merge branch 'hotfix_1.4.5'
update: added some logs when url fetch fails
fix: renamed variable (was not found).
Merge branch 'hotfix_1.4.5' into develop

Conflicts:
	dialoghandler/src/main/java/com/almende/dialog/adapter/TwilioAdapter.java
Merge branch 'hotfix_1.4.6' into develop