Minor code cleanup and improvements:
* remove lots of duplicate and unused code
* moved LDAPMessageHandler into io package since it is required by LDAPReader
* added LDAP utility class for creating LDAPReader / LDAPWriter as well as static methods for common encoding/decoding (previously in LDAPUtils)
* minor Javadoc improvements simplifications
* minor simplifications to NameForm builder
* added makeldif shell scripts and updated site
* fixed rest2ldap build which was broken due to recent changes to json-resource.