Update ramaze to 2012.04.14.

Update ramaze to 2012.04.14.

Changelog

* The Redis adapter (Ramaze::Cache::Redis) has been fixed so that it works
  with sessions, previously this would result in "Can't convert into symbol"
  errors and the like. This problem was caused by not encoding data using
  Marshal. Thanks to EdvardM for reporting the issue.
* The Redis cache adapter namespaces keys just like the other adapters.
* Ramaze::Cache::MemCache has been updated for the latest version of Dalli and
  should no longer display deprecation warnings. The minimum required version
  of Dalli has been set to at least 2.0.2.
* Various documentation improvements and additions.
* The HTML of the pagination helper can now be customized, thanks to Leucos
  and bougyman for adding it.