i07t06: Introduction of Memcached in both Coral and Lionfish

A small bug has been fixed. #131
i07t06: Introduction of Memcached in both Coral and Lionfish

createRelationship creates unique relationships now. #131
i07t06: Introduction of Memcached in both Coral and Lionfish

There have been added createUniqueRelationship and limit
parameter in some methods of Lionfish. #131
Merge branch 'lionfish' into spidercrab
Cypher -> Lionfish refactor part I