Generified all date/time converters.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/beanutils/branches/java5@1535151 13f79535-47bb-0310-9956-ffa450edef68
Generified CharacterConverter.

The converter now also checks whether it supports the passed in target type.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/beanutils/branches/java5@1535153 13f79535-47bb-0310-9956-ffa450edef68