Adding in first (untested) Parquet reader/writer
Merge remote-tracking branch 'origin/master' into parquet
Fixing the parquet output
Removing label node from AvroEdge (storing in properties map)
Working on the graph element set classes (and how the IO works). Unit tests will fail now
Working on bugs
More things working, still a few bugs left
Getting more of the unit tests to pass again
Fixed GraphSON output, but unlinked nodes will still be missed
Fixes to deal with changes in the Spark 1.0 release candidates
Fixing issues with the vertex merge functions
Adding readme and interactive shell command