Update tmux config
Update submodule oh-my-zsh 5f3e0cb...36df573

* oh-my-zsh 5f3e0cb...36df573 (5):
  > psgrep, ffind fixes, completion zstyle
  > color scheme setup (deactivated, experimental)
  > minor: whitespace, comments
  > prompt theme fixes
  > More minor title window title enhancements/fixes
mosh wrapper: bypass mosh's return code
colors-table: allow for bg param
Update gitconfig
Remove obsolete git-meld: `git diff-tool -d`
Update hub
ackrc: setup less ft
Update Rakefile: mainly "upgrade"