Release 2.2.2

Release 2.2.1 with fixes for 2.2.0 regressions

Release v2.2.0

Apparently Rails 3.1 does not like @headers as ivar

Release 2.1.2

Release 2.1.1

Version 2.1.0

Version 2.1.0.rc2

Releasing 2.1.0.rc

Release 2.0.4