Is your feature request related to a problem? Please describe.
Related to a problem surfaced by @Shanoir on Gitter.

Describe the solution you'd like
I think that it would be a good idea for us to let users set the filename and content-type headers through the Part annotation. Maybe like so:

    @multip

Should be easy to do and good exercise. Would be cool to have some sort of social auth via github/twitter/google integration.

Some examples:
https://github.com/skftn/flask-pastebin
https://github.com/mitsuhiko/flask-pastebin

Pickled pure Python MultiDicts should be unpickled as Cythonized if unpicker is executed on machine with Cython support.
And vise versa.

Will be great have approach to put some arguments for make test or commands some like this.

For that we need add some like that into Makefile.

# arguments
FIRST_ARG := $(firstword $(MAKECMDGOALS))
ARGS = $(filter-out $@,$(MAKEOVERRIDES) $(MAKECMDGOALS))
MAKEFILE_PATH := $(abspath $(firstword $(MAKEFILE_LIST)))

%:
	@:

and after that add ${ARGS} to our commands

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