Set initial version for series 0.2.x
Version 0.2.0
Version 0.3.0
Bump release series version.
Version 0.3.0 (version number fix)
Bump release series version.
Merge commit 'vumi-0.3.0'

Merge vumi-0.3.0 into master.
Minor fixes to release documentation after experience during 0.3.0 release.
Merge branch 'feature/issue-111-always-use-yaml-safe-load' into develop
Fix bug in metrics manager registration function that caused it not to complain about registering metrics with duplicate names. Also add a test that demonstrates the issue.
Record minor versions in release notes so we can nicely format multiple minor releases beneath a major version heading.
Add release-notes for Vumi 0.3.1.
Version 0.3.1
Merge commit 'vumi-0.3.1'
Version 0.4.0
Merge commit 'vumi-0.4.0'

Conflicts:
	docs/conf.py
	setup.py
	twisted/plugins/vumi_worker_starter.py
	vumi/demos/decisiontree.py
	vumi/tests/test_session.py
merge conflicts
Merge branch 'develop' of github.com:snopoke/vumi into develop