HAMA-780: New launched child processes by fault tolerance may not be able to contact each other

git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1505410 13f79535-47bb-0310-9956-ffa450edef68
HAMA-782: The arguments of DoubleVector.slice(int, int) method will mislead the user.

git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1505413 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of http://git.apache.org/hama into HAMA-732