Introducing DSE Graph Frames

The DseGraphFrame package provides a Spark base API for performing bulk operations and analytics on DSE Graph. It is inspired by Databricks' GraphFrame library and supports a subset of Apache TinkerPop Gremlin graph traversal language. Key features include reading DSE Graph data into a GraphFrame, writing GraphFrames from any format supported by Spark into DSE Graph, and tying together DSE Analytics and DSE Graph components more strongly than before. The package currently supports both Java and Scala Spark APIs.