Add an environment api to nodeunitq, and use it to avoid dumb setTimeout/setInterval problems.

Hello @x-ma, 

Please review the following commits I made in branch 'nick-setup'.

254cb8790b86ec2fba6d5a857b53d7c28b9e4b27 (2014-01-17 14:48:51 -0500)
Add an environment api to nodeunitq, and use it to avoid dumb setTimeout/setInterval problems.

R=@x-ma