don't receive future updates to express.js

... until this gets resolved:
https://github.com/strongloop/express/issues/2264

ref #92
Point to the new docker image
Filter falsey _npmUser values.
option not to cache third party files

ref #85
Merge remote-tracking branch 'origin/0.9.x'

Conflicts:
	lib/local-storage.js
remove undefined variable
Merge remote-tracking branch 'origin/0.9.x'