HAMA-915: Add Kryo serializer (edwardyoon)

git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1620823 13f79535-47bb-0310-9956-ffa450edef68
remove tab space

git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1620825 13f79535-47bb-0310-9956-ffa450edef68
git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1620829 13f79535-47bb-0310-9956-ffa450edef68
git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1620830 13f79535-47bb-0310-9956-ffa450edef68