Add vendor folder to git

vendor/github.com/emicklei/go-restful-swagger12/CHANGES.md

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+Change history of swagger
+=
+2017-01-30
+- moved from go-restful/swagger to go-restful-swagger12
+
+2015-10-16
+- add type override mechanism for swagger models (MR 254, nathanejohnson)
+- replace uses of wildcard in generated apidocs (issue 251)
+
+2015-05-25
+- (api break) changed the type of Properties in Model
+- (api break) changed the type of Models in ApiDeclaration
+- (api break) changed the parameter type of PostBuildDeclarationMapFunc
+
+2015-04-09
+- add ModelBuildable interface for customization of Model
+
+2015-03-17
+- preserve order of Routes per WebService in Swagger listing
+- fix use of $ref and type in Swagger models
+- add api version to listing
+
+2014-11-14
+- operation parameters are now sorted using ordering path,query,form,header,body
+
+2014-11-12
+- respect omitempty tag value for embedded structs
+- expose ApiVersion of WebService to Swagger ApiDeclaration
+
+2014-05-29
+- (api add) Ability to define custom http.Handler to serve swagger-ui static files
+
+2014-05-04
+- (fix) include model for array element type of response
+
+2014-01-03
+- (fix) do not add primitive type to the Api models
+
+2013-11-27
+- (fix) make Swagger work for WebServices with root ("/" or "") paths
+
+2013-10-29
+- (api add) package variable LogInfo to customize logging function
+
+2013-10-15
+- upgraded to spec version 1.2 (https://github.com/wordnik/swagger-core/wiki/1.2-transition)