Add ability to insert image in XMPP IM

[nops]

Now, pidgin have CustomSmiley? future, that gives to user ability to send images as smileys. But for XMPP conversation user cant send selected image ("Insert IM Image" button). I wrote the patch for allow user to insert image in XMPP IM.

[nops]

Patch to allow user to insert IM image

[darkrain42]

Quoting malu: I think using BoB is not an option for IM images, since it's designed for small pieces of data, to avoid stream negotiating, etc.

I agree.

[nops]

What XEP is prefer for sending images?

[darkrain42]

As the size of the image grows, move from BoB to IBB to SOCKS5 Bytestream (IBB is almost certainly good enough for everything), but such a solution needs to follow an XEP (which is not yet written) so that other clients know how to handle such an image (and Pidgin can determine if a specific buddy will support receiving images).