Add new committers to team page.

git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1493726 13f79535-47bb-0310-9956-ffa450edef68
rearrange team list (in alphabetical order)

git-svn-id: https://svn.apache.org/repos/asf/hama/trunk@1493728 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into vectormatrix
add DoubleFunctions and DoubleDoubleFunctions