Introduced Grape for member API.  Added first endpoint, POST /posts .
Rack routing for supporting both v1 and v2 of the API at the same time.
Use Strings instead of Symbols with Grape API.
Added POST /posts/:post_id/comments API endpoint.
Added POST /invitations API endpoint.
Added GET /notifications API endpoint.
Added grape-swagger to generate Swagger documentation for the member API.
Merge branch 'master' into grape-api

Conflicts:
	Gemfile.lock
Don't require API token for /docs endpoint.  Ensure token is required for all resources (Grape namespaces).
GET /notifications endpoint: Change "seen" param to "unseen".  Describe parameter defaults.
Rename "unseen" param to "only-unseen".
Merge branch 'master' into grape-api
Bump grape-swagger, thereby removing kramdown dependency.  Remove markdown option from add_swagger_documentation .
Use Parkdown for Markdown in Swagger docs.
Merge branch 'master' into grape-api
404 is erb now, not xhtml (Etanni).
Do not put resource name itself in the content_type.
Use update instead of = and save.
Use Sequel `take`.
Merge branch 'master' into grape-api