mock thinky connections when doing a build

[stephenlacy]

I needed to add a process.exit(err? err : 0) to the end of the webpack.run cb in the bin/compile file to close the connection when the build finishes. Do you want to merge a pr for that, or would you rather restructure the compile process to not hold open connections?

[yocontra]

@stevelacy Actually just did that, but the build should not touch the DB since a production build will try to connect to the production DB which is obv not good