Merge branch 'version/bump'

Bump composer.json branch aliases
[2.2.0rc1] Release preparation

- Updated all component composer.json files to reflect new branch aliases
- Updated changelog
- Updated readme
Merge branch 'releases/2.2.0'

2.2.0rc1 readiness
Merge branch 'releases/2.2.0' into develop

2.2.0rc1 readiness

Conflicts:
	README.md
	library/Zend/Version/Version.php
Version bump

- 2.2.0dev until we hit stable
Merge branch 'version/bump' into develop

bump to dev version

Conflicts:
	README.md
	library/Zend/Version/Version.php