Trying to get powerline working properly, again
Changing path for powerline
Removing vim powerline
Trying to get the new bits working

The tmux one works, which is great. The vim one does not.
Removes the tmux specific powerline too
Install will create directories as required
Delete tmux powerline config
Adds powerline config
Removes separate configuration of tmux status bar
Finally gets tmux powerline working

Had to have an explicit path, need to find out how to update
/bin/sh path.