Make Caps-Lock behave as Escape on its own via xcape
Switch to Lokaltog/powerline again, only used for ipython/tmux
Update submodule zsh-syntax-highlighting 5320f1e...3dc5741

* zsh-syntax-highlighting 5320f1e...3dc5741 (4):
  > Merge pull request #140 from randomize/pr_fix_issue_#77
  > Merge pull request #134 from sonnym/enable_quick_history_substitution_highlighting
  > Merge pull request #142 from jcassee/master
  > Merge pull request #143 from vincentbernat/fix/yank-pop