Release 0.15.0

Release 0.15.0

Update version in preparation for release. Note that release notes wi…

…ll be part of the release on github.

Releasing 0.15.0-RC1

Releasing 0.14.0-RC1

Releasing 0.13.0

the 0.12.0 release

storehaus 0.11.2

Merge branch 'release/0.11.1'

Conflicts:
	CHANGES.md
	project/Build.scala

Release 0.11.0