Introduce the initial version of the Parser JSON API

- List all the parsers
GET /services/rest/parser

- Get details about one parser. Which fields are returned. Which properties exists.
GET /services/rest/parser/{parser_name}

- Use a parser by uploading a file
PUT /services/rest/parser/{parser_name}?lang={optional_lang}&p.{any_parser_property}={property_value}
The body is the file.

- User a parser by providing a local file
PUT /services/rest/parser/{parser_name}?lang={optional_lang}&p.{any_parser_property}={property_value}&path={file_path}
The file is located with the "path" parameter.