support for image pasting with or without media module

- Allows pasting of IMG tags
- Reorder Webedit-paste filters
- New filter encodes media image JSON, regular filter now de-encodes it

I this is fairly safe, it only affects images, really like to get it in with the current deploy because my users are BEGGING for this functionality.

I figured out how to make it work in an AH-HA moment on the bus, so it must be good.