Fixed test freeze by test_handler_proxy
Remove the constraint option for QuickCheck
Merge pull request #77 from m-yoshimo/fix-test_handler_proxy

Fixed test freeze by test_handler_proxy
Merge pull request #80 from ikehara/fix_for_travis

Remove the constraint option for QuickCheck
Replication over clusters
Fix the review inducation and make more tests
Fix a bug of cluster replication
Fix cluster replication issues
Refactor test of cluster replication
Fix namespace of boost for cluster replication
Fix cluster replication tests