Merge pull request #2 from changedi/cluster-20131129-2

Cluster 20131129 2
add cluster basic classes

Signed-off-by: changedi <jysoftware@gmail.com>
Merge branch 'master' of https://github.com/changedi/data-vnix into cluster-20131129-2
add

Signed-off-by: changedi <jysoftware@gmail.com>
add point and unit test case

Signed-off-by: changedi <jysoftware@gmail.com>
remove unused comments
remove main

Signed-off-by: changedi <jysoftware@gmail.com>
Merge branch 'cluster-20131203' of https://github.com/changedi/data-vnix into similarity-20131130
add manhattan distance