Add email recipients endpoints, controller + model
Refactor incidents endpoint into sepr. controller
Refactor to share db conn. and use sep. transforms

- Custom transforms moved into own modules in transforms folder
- db now singleton and shared between models
Update readme with new endpoints
Add sql testing data for incident_email_recipients
Add sql testing data for incident_notes
Merge pull request #3 from mediasuitenz/add/email_recipients_endpoints#TMP-164

Add/email recipients endpoints#tmp 164