cleanup and typo fixes

fixing some typos on the applications page, as well as putting a previous typo fix into the corresponding .jade document where it belonged.  Commit https://github.com/hotsw4p/expressjs.com/commit/b7f4dd72d84e87679defb177aa1da516418bbcbe seems to the same as https://github.com/visionmedia/expressjs.com/pull/56