Changed definition of IMochaTest and temporarily reverted node.d.ts commit

Changed definition of IMochaTest to allow before( function (done) {))… …
… - strangely the optional title in the definition did not work for this case

Note: I have submitted a pull request at codeplex for the util.inspect definition as upon review it is clearly incorrect. We'll see if they accept it.

http://typescript.codeplex.com/SourceControl/network/forks/sudsy/typescript/contribution/4389