Get rid of annoying log messsages on shutdown.
Merge pull request #71 from fegin/master

Bugs and warnings fixed.
Merge pull request #72 from fegin/master

Add logistic regression and ridge regression examples based on SGD.
fix some bugs that occur in pagerank benchmark
Merge pull request #73 from fegin/master

Fixed DeprecationWarning: using a non-integer number ....
Merge branch 'master' of github.com:spartan-array/spartan
change some var name in test_pagerank
Merge pull request #74 from MaggieQi/master

fix some bugs that occur in pagerank benchmark
Merge pull request #75 from spartan-array/fix-logging

Get rid of annoying log messsages on shutdown.
The array in test_serialization.py maybe too large for Travis CI