* Instead of limiting a request to a single file when
performing an upload, use a slice of files so an
arbitrary number of files can be used in the form.
* Remove commented out line of code
* Update examples for multi-form file fix for multiple files
* Convert spaces to tabs for indentation
* Updated examples to have tabs instead of spaces
* Add an example of a multipart/form-data OA3 schema
that contains two files to be uploaded
* [go] More idiomatic godoc comments
* [go] Mark deprecated fields and functions
* [go] Minor mustache readability/consistency fixes
* [go] Mark deprecated operation parameters
* [go] Deprecate a petstore component property for testing
* [go] Apply deprecated godoc in Go servers also
