Update submodule powerline 39dda39...6eaa640

* powerline 39dda39...6eaa640 (2):
  > Release 1.3.1
  > Release 1.3
Update submodule oh-my-zsh 1815a31...799a898

* oh-my-zsh 1815a31...799a898 (10):
  > Only setup ag alias if it is installed
  > Fix _is_slow_file_system for systems with `df -T` (for cifs)
  > theme: my-set-cursor-shape: support Konsole, compdef, info
  > theme: handle Konsole in 'Vim mode indicator'
  > theme: handle exported GIT_DIR
  > theme: check for KONSOLE_PROFILE_NAME in is_gnome_terminal
  > theme: git: improve ahead/behind check (via prezto's git-info)
  > minor: remove doc (fixed)
  > theme: make use of $_git_cmd
  > theme: use git cmd from vcs_info zstyle