*sh: add some more one-letter aliases

I took a look at the output of:

  history -100000 | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head -30

(ie. a list of top commands, sorted by frequency) on the main machines I
work on. The most obvious candidates for one-letter aliases are [a]ck,
[f]low, ssh-[r]eagent and [s]sh, so add them.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

	extras/out/
Add terminfo info to extras/README.txt

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Clean up broken symlinks

Signed-off-by: Wincent Colaiuta <win@wincent.com>
*sh: add shortcut to ssh to workstation

For the ultra lazy; with this I can type:

  ssh

or even just

  s

to get to my workstation.

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Zsh: update prompt "added" indicator color to green

I want my prompt colors to match the corresponding colors in the `git
status` output. Turns out that what I thought was yellow was actually
green.

Signed-off-by: Wincent Colaiuta <win@wincent.com>