Review export command-line options

[sbesson]

I could imagine having a method for setting arbitrary bioformats2raw properties:

--bf:max_workers=

Originally posted by @joshmoore in #76 (comment)

Could even go as far as --bf2raw-config=<config_file> with an INI style of YAML list of key/value pairs to be passed to bioformats2raw

Originally posted by @sbesson in #76 (comment)

well, if you're going to go that far, I'd take a config file for all of the properties here, and separate into [bioformats2raw] and [default] (or [omero]) ;)

Originally posted by @joshmoore in #76 (comment)