* Minified assets are now cached in MongoDB; if the md5 doesn't change, they are reused for faster startup after deploy
* A nice general-purpose caching API for Apostrophe with a default implementation built on MongoDB

TODO: I should do the cache-or-compile trick for individual files, not the complete sets, so that even if a few files have changed there is much less work to be done
Merge branch 'editor2' of github.com:punkave/apostrophe into editor2