Fix hg prompt functionality for Python 3.8 Includes Mathieu Clabaut's Python 3.8 patch (https://bitbucket.org/sjl/hg-prompt/issues/45/python-38-port) and reverts 0850e9a3 where the author stripped incoming/outgoing functionality (because I use it)

set -g base-index 1
set-option -g prefix C-a
set -g status-bg black
set -g status-fg white
#set -g terminal-overrides 'xterm*:smcup@:rmcup@'
#setw -g mode-mouse on
setw -g xterm-keys on
setw -g allow-rename off