we said as long as its no pain, we continue to support 2.2. for the upcoming 1.1 of the cmf, sf 2.2 is still supported. for the next release in summer, we drop 2.2 support and will remove some hacks that we needed. 

note that the cmf versioning is [semver](http://semver.org/), we don't indicate the sf version in our versions.