add application version stats (closes #256)
add application version stats (closes #256)

basho/riak_search,DavidAlphaFox/riak,elkingtonmcb/riak,biddyweb/riak,xuejianhai/riak,yangchengjian/riak,glickbot/riak,wwezhuimeng/riak_search,authbox-lib/riak,laurenrother/riak,planobe/riak,planobe/riak,amyvmiwei/riak,GabrielNicolasAvellaneda/riak,xuejianhai/riak_search,basho/riak_search,xuejianhai/riak_search,wwezhuimeng/riak_search,basho/riak