Use class utilities to get generic type.
https://github.com/tinkerpop/frames/issues/69
Package refactor.
Move all new 2.4.0 features into their destination packages
https://github.com/tinkerpop/frames/issues/62
Tests added for deprecated style registration of annotation handlers and
frame initializers.
https://github.com/tinkerpop/frames/issues/61
Merge remote-tracking branch 'upstream/master'