Add Images to Gallery

[carsonwilliamsdev]

New Feature:
Add images posted in chat to a Piwigo website gallery.
Images should be sorted into albums by user.
Add #tags from text posted with the image.

[boveus]

We should have some sort of consideration for private or nsfw channels, so we should have a #private and #nsfw tag that causes things to behave differently. Another approach might be to opt in to the gallery posting through adding a tag to an image, so that an untagged image doesn't get posted.

[carsonwilliamsdev]

Using img.su.pe for the Gallery host.
Piwigo API: http://img.su.pe/tools/ws.htm