Revert "Merge pull request #189 from blueyed/revert-tmux-dcs"

This reverts commit 41c6f5294a9fe8c481dde338ffd6e37c04ed4777, reversing
changes made to 1fa1eac643d08976cebceab22cf014a049efb53c.
Update README.md
Update README.md
Merge pull request #193 from blueyed/master

Revert "Merge pull request #189 from blueyed/revert-tmux-dcs"
Merge remote-tracking branch 'chriskempson/master'