Removed Callback interface since it wasn’t being used.
Added RestExpress.enforceHttpSpec() and .setEnforceHttpSpec(boolean) to enable setting the HTTP specification enforcement.  Previously, enforcement was always turned on. Now default is OFF. With it off, RestExpress allows you to create non-standard (per the HTTP specification) responses. With if off, performance should increase slightly.
Upgraded to Netty 3.9.0 Final.
Updated release notes.