Added step to simplify swagger for code generation. Fixed a few missing types in schemas, added schemas for login/logout responses

enable users 422 test and change invalid json response code to 422

change invalid json code back to 400

Adds raml/ directory with RAML api spec
Schemas moved from api/schemas to raml/schemas
Add Abao to Travis build for automated integration testing based on API spec
Add Abao test hooks to enable some very basic workflow testing

Adds raml/ directory with RAML api spec
Schemas moved from api/schemas to raml/schemas
Add Abao to Travis build for automated integration testing based on API spec
Add Abao test hooks to enable some very basic workflow testing