move finding nodes and conectors, node and connector creation to jquery dom extension functions
move finding nodes and conectors, node and connector creation to jquery dom extension functions

pyxis777/mapjs,bhargav175/mapjs,AbdulMuhsinSE/mapjs,AbdulMuhsinSE/mapjs,bhargav175/mapjs,pyxis777/mapjs,danielrasmuson/mapjs,danielrasmuson/mapjs,AbdulMuhsinSE/mapjs,danielrasmuson/mapjs,mindmup/mapjs,bhargav175/mapjs,mindmup/mapjs,pyxis777/mapjs