Remove unused ,, function
Add filetype settings for Python per PEP8

See <http://www.python.org/dev/peps/pep-0008>.
Delete unused zlogout
Delete unused zprofile
Remove unused parts of zpreztorc
Remove unused parts of zshenv
Remove unused parts of tmux.conf
Clean up screenrc
Remove comment blocks from profile
Remove unused project specific .irbrc feature
Trim inputrc
Clean up bashrc
Remove comment at top of bash_profile
Remove weechat config
Remove unused terminator config
Add simplified install script
Remove symlinking from script/bootstrap
Remove check for git dependency

Git must be installed to clone the dotfiles repo anyway.
Update README
Add Prezto dependency as a submodule