Changelog:
==========
-Reuse the File, Config field, and file-related validators from flask-marshmallow
-Add support for a --quiet option to the flask spec command
-Fix the flask spec command for validators operating on complex data types
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
