Update version
Update ntp/mysql/memcached versions
Merge pull request #48 from claco/update-berks

Merged automatically by jenkins after successful build test
Add CHANGELOG.md
Point Berks to v4.2.1rc refs
Merge branch 'master' into v4.2.1rc

Conflicts:
	Berksfile
Update version for release
Update Berksfile references to v4.2.1 releases
Updated Changelog