Remove some Koala gem functions
Create activity controller
Create comment Model
Add activity model, polymorphic Comments + edit routes
Add missing pages

- Fix calculation for sporting
- Add pages (progress) view
Get messages from multiple users
Get all messages from self and friends till a week ago
Update seeds to create activities
Update comment
Add polymorphic migration + model + relations
Set height container
Find activity
Edit comment route
Link for every activity
Get messages till one week ago
Comments controller
Update sporting concern
Add meters by sport and smoking input
Add Jquery UI (datepicker + autocomplete)
Update Styling and options for Datepicker