closes #15

There may be other kinds of items (like an HTML string).

allow configuring a password for uploading

Settings files[0] doesn't work with Firefox, but setting files works
with Fx 57+.

commit e5574ec8aa
Author: gloomy-ghost <gloomy-ghost@users.noreply.github.com>
Date:   Sat Feb 17 17:40:54 2018 +1300

    Directly submit form

commit 9febcf9d96
Author: gloomy-ghost <gloomy-ghost@users.noreply.github.com>
Date:   Sat Feb 17 17:23:54 2018 +1300

    Update index.html

commit 0f80f54b3e
Author: gloomy-ghost <gloomy-ghost@users.noreply.github.com>
Date:   Sat Feb 17 14:57:58 2018 +1300

    Allow upload image from clipboard

WSGI support is already broken, removed.

This reverts commit 9bcfe6f404.

It doesn't work as expected

Stop icon 404

Debian is really disappointing :-(

Debian has old ImageMagick that doesn't know webp...