Add configuration for deploying with Dokku
Merge pull request #11 from fastmonkeys/feature/deployment

Add configuration for deploying with Dokku
Deploy automatically on successful CI build
Add comment model
Add api for getting comments
Add api for creating comments
Add gray color and less variables
Show comments in hearing page

This is just a raw version. The final version will be implemented
in Angular.
Remove main section from hearing

Simplifies hearing relationships.
Fix image urls