Changed to GET
Merge pull request #93 from EnzoMartin78/develop

Changed to GET for messages
Merge branch 'ServiceStack_Refactor' of https://github.com/Pure-Battlefield/gswat into ServiceStack_Refactor
Refactored /api/messages to all be GET

All operations were data retrieval and idempotent.  Therefore, I
transitioned them to GET requests, with the default action being to
retrieve all messages.

Currently, the Save button does not work.