#108 quick shell command

This idea is still in the works but basically allow you to set commands that you're going to run a lot to certain keybindings. This might be how the C-c prefix will finally get used. I'm thinking that you can set them either via the command line args or via something like C-c s <number>. Here is an idea on how the CLI args might work:

$ ait -c "spell" -c "xsel" -c "fmt -w 70" foo.txt

That would set C-c 1 to the spell, C-c 2 to xsel, and C-c 3 to fmt -w 70.

Going to close this and not actually do it. I've decided that it's easier to just make a little script that does this for you. I'll be committing my personal one in scripts/ eventually but it just lists out the commands you want and you can pick them out quickly. Probably not as fast as a keybinding but I prefer the simplicity over the ease.