Very early work on migrating emop database into rails
* Rename the example database and secrets to be consistent with default naming used by Rails
* Change API job_status params to job_status_id to match changes to database
* Massive overhaul of database to remove need on external database and use only the Rails managed database
** This includes updating column and table references in the controllers
* Update associations
* Move the defaults set previously in MySQL to be set using after_initialize in Rails
* Setup JobType, OcrEngine and JobStatus using seed data
Update travis-ci configuration to create databases
Create database in travis-ci
Add API doc for job_queue reserve
Regenerate api docs