Update POI status

[cailyncodes]

We need to add the ability to:

1. Move POIs from Draft to Pool (Editors)
2. Approve POIs for Publication (Admins)
3. Publish POIs (Publishers)

Back end I don't think is written

Front end needs to be written

[cailyncodes]

@mappingviolence/front-end
@ejiao

[cailyncodes]

servlet is now written, with draft to pool front end done

[cailyncodes]

Front end left:
Admins: Move to Approved
Publishers: Move to Pubished
@ejiao @mappingviolence/front-end