moved detailed contribution info to the end of the README, since it was getting a bit long
moved detailed contribution info to the end of the README, since it was getting a bit long

ExtPoint/extnodeunit,zuazo-forks/nodeunit,hildjj/nodeunit,robert-berg/rjberg-nodeunit,caolan/nodeunit,BuZZ-dEE/nodeunit,BuZZ-dEE/nodeunit,isaacs/nodeunit,hildjj/nodeunit,sethmcl/nodeunit,caolan/nodeunit,sethmcl/nodeunit,ExtPoint/extnodeunit,1602/nodeunit