[WIP] add a form upload extension

[docteurklein]

trafficstars

[Djeg]

Cool pull request and nice shot of you :-)

[docteurklein]

If anyone is up to finish this (if needed), go on :)

[gquemener]

What do you think about allowing overriding the upload path in the file field options? Use case is when having many file fields f1 and f2 and you want f1 to be uploaded in uplods/foo and f2 in uploads/bar. :palm_tree:

[docteurklein]

@gquemener indeed!

[docteurklein]

:cactus: