adding categories-sidebar by pankajanupam

git-svn-id: http://plugins.svn.wordpress.org/categories-sidebar/trunk@622780 b8457f37-d9ea-0310-8a92-e5e31aec5664
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git-svn-id: http://plugins.svn.wordpress.org/categories-sidebar/trunk@623027 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merge svn to git