Caching the result of 'isInternalImplementation' so that reflection doesn't get invoked on every subscribe
Merge pull request #447 from mattrjacobs/internal-impl-cache

Caching the result of 'isInternalImplementation'
[Gradle Release Plugin] - pre tag commit:  '0.14.6'.
[Gradle Release Plugin] - new version commit:  '0.14.7-SNAPSHOT'.
Update CHANGES.md