Small fixes (1.1.0)

[ikitommi]

• BREAKING: Move compojure.api.swgger/validate to compojure.api.validator/validate.
• BREAKING: If a resource doesn't define a handler for a given request-method or for top-level, nil is returned (instead of throwing exeption)
• BREAKING Resource-routing is done by context. Trying to return a compojure.api.routing/Route from an endpoint like ANY will throw descriptive (runtime-)exception.

(context "/hello" []
  (resource
    {:description "hello-resource"
     :responses {200 {:schema {:message s/Str}}}
     :post {:summary "post-hello"
            :parameters {:body-params {:name s/Str}}
            :handler (fnk [[:body-params name]]
                       (ok {:message (format "hello, %s!" name)}))}
     :get {:summary "get-hello"
           :parameters {:query-params {:name s/Str}}
           :handler (fnk [[:query-params name]]
                      (ok {:message (format "hello, %s!" name)}))}}))

• api-level swagger-options default to {:ui nil, :spec nil}. Setting up just the spec or ui, doesn't automatically setup the other (like previously)
• Strip nils from :middleware, fixes #228
• Support compojure-api apps in Google App Engine by allowing scjsv to be excluded (uses json-schema-validator, which uses rogue threads):

[metosin/compojure-api "1.1.0" :exclusions [[metosin/scjsv]]]