Add script for bumping version

devflow-bump-version updates the version file that exists at the
toplevel of the git repository and commits the change.
Bump version
Merge branch 'release-0.6'

Conflicts:
	devflow/autopkg.py
	setup.py
	version
Bump version
Merge branch 'master' into debian-master
Bump version to 0.6-1

Signed-off-by: Buildbot <buildbot@slave1>
Bump version to 0.8
Bump version and update manifest
Merge branch 'master' into debian

Conflicts:
	version
Merge branch 'master' into debian

Conflicts:
	MANIFEST.in
Print 'push' help message in one line
Do not print colors if stdout is not tty

Refs #3520
Bump version to 0.10
Bump version to 0.9next
Create helper function for getting config
Properly allow debian revisions

* Debian tag should be derived from debian version
* Python tag will be the same for different debian revisions
Export DEBEMAIL and DEBFULLNAME
Fix typos/imports
s/mail/email
Tag debian branch only in release mode