Removing or replacing images with no license.

Removed:
- Deeper (from Inception)
- Gasp (from Sponge Bob)
- "Internet Husband" meme about decorating house

Replaced:
- Fantasia Mickey (replaced by lego magician)
- Horse argument invalid (replaced by silly Flickr horse)
- Prepare Yourself cat (replaced by a tinfoil hat "prepared" person)

Relates to #26.