some alias changes, and a note in the README to remove my shit
Some default ag settings

Ag is way faster than ag, so that'll be my main tool for searching if
it's installed on the system.
It doesn't use an ackrc file though, so this commit adds in an alias
with all of the default commands I need
It also removes a lot of things in my ackrc that I don't want anyways
Cleans up a lot

Start using autoload for my own functions (ssh-reagent). Clean up zshrc
and move some stuff to zshenv. Clean up some aliases. Other random
things, even added in some comments
Merge branch 'master' of github.com:Aaronneyer/dotfiles

* 'master' of github.com:Aaronneyer/dotfiles:
  add a setup method to get up to date tmux/git