Classifier RESTful API

[vaunapuu]

AS AN ADMIN I WANT all of these APIs to exist SO THAT integrations can be done quick and easy and information exchanged easily

• [ ] #54
• [ ] #55
• [ ] #56
• [ ] #57
• [ ] #58
• [ ] #80

[turnerrainer]

@vaunapuu marking this as wontfix as we have all of our functionalities as separate REST endpoints. Every single one of them.

Regarding Jira, Exchange and DHS, these should be covered within #82.

PS! DHS is not covered in #82