Exporting AVIS from demos

Before

- Set developer to 0

- Clear out the screenshot directory

For each demo

- Set fixedtime to 50
- Set cl_avidemo to 20
- Type in demo "demoname"
- Wait a REALLY LONG time
- Wait for the demo to end
- Set cl_avidemo to 0

After each demo

- Batch convert all the TGA’s from uncompressed to JPG’s (highest quality)
- Delete the TGA’s
- Make a directory somewhere else
- Copy off the jpg’s to that directory