Added bundle install alias to .zshrc
Added ctrl-R for searching history, 256 color terminal
Added setting to remove whitespace from source files when saving in vim
Added line numbers by default in vim
Added vim leader keys for running specs
Added a variety of .vimrc settings

  * Remapped esc key, using jk combo for esc
  * Added shortcuts for editing & sourcing .vimrc
  * Added ack as default :grep command
  * Added reference to ctags file
Updated tmux for window & pane resizing
Automatically trust RVM
Revised POW domains
Cleaned irb config since Pry settings were crashing
Added unstage alias for git
Added gist config, default github user, default push setting
Updated .git-completion.bash
Updated gem config to not install docs
Updated bash aliases
Updated .bash_profile to work with RVM