tweak bell settings
change vim backup dir

I started getting annoyed with backup files being everywhere. Putting
them all in one directory gives almost all of the protection with almost
none of the annoyance. The only problem is that editing files with the
same name all share one backup file. If I ever get burned by this maybe
I'll care.
add cfind command to vim

Sometimes I want to grep, and sometimes I want to cfind, and it's
easiest to explicitly choose.
make TorbijIndent support sh
QFComment tweaks