Add email / smtp configuration in settings

(no emails being sent yet though)
Merge pull request #39 from ongoworks/devel

UI / UX Updates
Update docker proxy ip from localhost

172.17.42.1 when running inside a docker host
Update Dockerfile

Upgrades Node
Updated Dockerfile
Check that settings exist before loading
Updated
Merge branch 'devel' of https://github.com/ongoworks/rocker-docker into devel