Update vim enhancements README with Lightline
Make tmux split exactly 50%
Update aliases.zsh

Adding :q to exit your shell
Merge pull request #569 from adamenger/patch-1

Add :q to exit shell
Merge pull request #565 from ianks/tmux-split

Make tmux split exactly 50%
Merge pull request #564 from timstott/update_documentation

Update vim enhancements README with Lightline
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Update aliases.zsh
  Make tmux split exactly 50%
  Update vim enhancements README with Lightline