created d3plus.utils.child, d3plus.utils.d3selection, and beefed up d3plus.utils.uniques to not return "undefined" values
created d3plus.utils.child, d3plus.utils.d3selection, and beefed up d3plus.utils.uniques to not return "undefined" values

CodeCutterUK/d3plus,alexandersimoes/d3plus,mayblue9/d3plus,mssyogi/d3plus,bryanph/d3plus,DeemaJS/d3plus,romind/d3plus,Jay-Oh-eN/d3plus,kizzyterra14/d3plus,romind/d3plus_sandbox,lucasmachadorj/d3plus