Added the legend to the bottom of the graph.
Added the legend to the bottom of the graph.

wangtuanjie/kairosdb,kairosdb/kairosdb,ppbizapps/kairosdb,ppbizapps/kairosdb,wangtuanjie/kairosdb,KCFTech/kairosdb,panqingcui/kairosdb-1,wangtuanjie/kairosdb,KCFTech/kairosdb,panqingcui/kairosdb-1,wangtuanjie/kairosdb,at15/kairosdb-1,KCFTech/kairosdb,rdettai/kairosdb,kairosdb/kairosdb,rdettai/kairosdb,lgscofield/kairosdb,deejay1/kairosdb,george-aprozeanu/kairosdb,pawellesniewski/kairosdb,rdettai/kairosdb,at15/kairosdb-1,deejay1/kairosdb,rdettai/kairosdb,kairosdb/kairosdb,pawellesniewski/kairosdb,pawellesniewski/kairosdb,ppbizapps/kairosdb,kairosdb/kairosdb,lgscofield/kairosdb,george-aprozeanu/kairosdb,deejay1/kairosdb,at15/kairosdb-1,ppbizapps/kairosdb,wangtuanjie/kairosdb,KCFTech/kairosdb,pawellesniewski/kairosdb,pawellesniewski/kairosdb,panqingcui/kairosdb-1,lgscofield/kairosdb,lgscofield/kairosdb,kairosdb/kairosdb,deejay1/kairosdb,panqingcui/kairosdb-1,george-aprozeanu/kairosdb,rdettai/kairosdb,at15/kairosdb-1,george-aprozeanu/kairosdb,lgscofield/kairosdb,panqingcui/kairosdb-1,ppbizapps/kairosdb,deejay1/kairosdb,at15/kairosdb-1,kairosdb/kairosdb,george-aprozeanu/kairosdb,KCFTech/kairosdb