MongoDB 2.4.10

An update to https://github.com/Homebrew/homebrew-versions/pull/418.
Modified formula from original at [10e832](https://github.com/Homebrew/homebrew/blob/10e8328f911c4f062c33717662d4152baca62482/Library/Formula/mongodb.rb).

@adamv:
* No longer using bottles or overriding #name.
* Stable block gone.