Update dependencies to their newest versions
Update dependencies to their newest versions

Updates the following dependencies:
* Gremlin: 2.4.0
* Titan: 0.3.2

Adds the following new dependency:
* titan-lucene: 0.3.2

inolen/gremlin-node,RedSeal-co/gremlin-v3,RedSeal-co/gremlin-v3