Add terminfo for screen-256color-it and screen-it with fixed italics/standout for tmux
Update submodule oh-my-zsh bf74fce...2ed066f

* oh-my-zsh bf74fce...2ed066f (2):
  > Escape { to fix syntax highlighting
  > terminfo: use/try screen-256color-it via ~/.terminfo for fixed italics/standout in tmux