Replaced the janky /apos/scripts.js and /apos/stylesheets.js routes. Now we populate the physical files public/css/minified-anon-nnnn.css, public/js/minified-anon-nnn.js, etc., where 'nnn' is a unique identifier for the lifetime of this specific node process, unless you specify one via the text file data/generation (the identifier must be all digits).

This allows nginx to server the main CSS and JS files of Apostrophe via `try_files`, for improved performance. It is also a step on the road to multicore support.
Merge branch 'master' of https://github.com/punkave/apostrophe