Home directory

This basically exists to set up my OS X command line environment to something sensible, which means:

• Set up Emacs
  • Set EDITOR and VISUAL to the right emacsclient
  • Make sure that emacs -nw etc. launches the correct Emacs (OS X ships with version 22 - the current version is 24.1)
• Set up some Homebrew paths
  • Install bash-completion
• Do the right thing for rbenv
• Add some sensible Git defaults (such as autorebase)

It also deals with the OS X bashrc vs bash_profile issue (it's the reverse of how they're executed on Linux).

Also included are tmux and screen configuration for when I need to set up a remote machine.