Merge pull request #140 from jasobrown/master

Removing dependency on cassandra's DebuggableThreadPoolExecutor
Merge pull request #141 from jasobrown/master

adding license header to source and config files
Gradle Release Plugin - new version commit:  'priam-root-1.2.1'.
Merge pull request #143 from jasobrown/master

write out the num_tokens property to the yaml file
Gradle Release Plugin - new version commit:  'priam-root-1.2.2'.