GIRAPH-825 and GIRAPH-840

[Roman Shaposhnik]

Hi!

Given how big the diff here are:
    https://issues.apache.org/jira/browse/GIRAPH-825
    https://issues.apache.org/jira/browse/GIRAPH-840
I am wondering whether it is realistic
to have them in 1.1.0.

Would appreciate folks chiming in.

Thanks,
Roman.