Dropping OGNL supports

Like vraptor4, we can dropping OGNL supports.

Opensymphony was died, and the OGNL has no support from the owner. The code was donated to Apache, but since jun/2011 has no new version. At this time the source from Apache still in beta and there are **no significant changes** for 2 years ago. See https://svn.apache.org/viewvc/commons/proper/ognl/trunk/src/main/java/org/apache/commons/ognl/. If Apache delivery a new version of OGNL, we need to migrate the code to new package org.apache.commons.*.

Maintain two APIs that do the same thing is too boring. Duplicate code, duplicate tests... And if we improve a new feature, we need to coverage these two APIs.

In the mailing list, for each thread we need to ask if user is using IOGI or OGNL, and for many time users can't know.

IOGI have some corner cases to solve. But I think that is a good opportunity to improve IOGI.