Necessary update

I have just started learning Express and Mongo and found your LostAndFound application worth tinkering. I have updated it and corrected minor mistakes. You can happily ignor this pull request, not a problem.

P.S.
* "unstrictified" shoud be '"unstrictified" dependencies'.
* I don't know coffee-script well enough to correct the common.coffee, so I have manually amended common.js.