fix spec description
support app API: report-a-problem

this is to enable the 'feedback' app to hand off the responsibility
of talking to Zendesk to the 'support' app
support: use more appropriate webmock calls
support: add more test coverage
support: add bangs to posts so that every error is raised
json_client: update comment on non-bang methods
Merge remote-tracking branch 'origin/report-a-problem-api-in-support-app'