Updated deps for newer git, released version of guava
[maven-release-plugin] prepare release halbuilder-json-3.1.2
[maven-release-plugin] prepare for next development iteration
Merge branch 'release/3.1.2'

* release/3.1.2:
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release halbuilder-json-3.1.2
  Updated deps for newer git, released version of guava
  Updated dependencies
  Update guava to 15.0
  Adding support for SINGLE_ELEM_ARRAYS flag in the renderer and adding two new tests to test serializing single element arrays with and without the flag enabled
  Added simple test case looking up links by rel.
Merge tag '3.1.2' into develop

Rel

* tag '3.1.2':
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release halbuilder-json-3.1.2