HAMA-809 - applied draft patch to solve LR cost function problems

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Update website index page

git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1531249 13f79535-47bb-0310-9956-ffa450edef68
HAMA-809 - small refactoring of LRM

git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1531265 13f79535-47bb-0310-9956-ffa450edef68