Added set nolist to syntax files.

When using set list to show whitespace characters the slide backgrounds are replaced with the special characters instead of the actual background.

Before: 
![screen shot 2013-11-15 at 11 20 05 am](https://f.cloud.github.com/assets/1445303/1551824/4cac82e6-4e1a-11e3-9d0d-007fd9ace4ea.png)

After:
![screen shot 2013-11-15 at 11 21 27 am](https://f.cloud.github.com/assets/1445303/1551828/6498d198-4e1a-11e3-8cd0-6f6856b79f83.png)