Remove raphael js

Since we dont show a graph on profile anymore, we can remove this.

Actually after rails 4.x upgrade this was not even compiling, it was 404 on production
Merge pull request #822 from arthurnn/rm_raphael

Remove raphael js
Use secrets.yml file instead of initializer
Use Rails.application instead

Rails 4.1 default configuration is to use Rails.application instead of Gemcutter::Application
Update choice to version 0.1.7
Update mini_portile to version 0.6.2
Merge pull request #823 from arthurnn/upgrade_configs

Upgrade configs