API tweak - process-teacher statusIds

[pythondave]

http://pythondave.github.io/th-admin/2/0.4/scaffolding/api/default.html#/process-teacher/0

Change the status of a teacher to "Approved"

Current: { teacherId: 123, statusId: 4 }
Proposal: { teacherId: 123, statusId: 1 }

AND

http://pythondave.github.io/th-admin/2/0.4/scaffolding/api/default.html#/process-teacher/1

Change the status of a teacher to "Declined"

Current: { teacherId: 123, statusId: 5 }
Proposal: { teacherId: 123, statusId: -1 }

[pythondave]

API changed. Front-end also changed so that it works with the new API.