C-a allow use to trigger tmux prefix more easily than C-b, at the cost
of overriding the readline beginning of line. This change remaps it to
C-s, which has the same effect without that drawback.
Remove last-pane bindings.
Map prefixes to underlying behavior
Quoting Chris Toomey:
> I'm wondering if we might want to take a different approach with these
> keys. last-pane is already bound to ; by default which is comfortably
> on the home row, and if using vim-tmux-navigator also bound to
> (unprefixed) C-\.
This is Mac OS X-specific. Including this line in the dotfiles causes
`tmux` and `tmux new -s new-session` to break with `[exited]`.
I personally don't do copy-pasteable work inside tmux anymore.
I'm sure this is valuable to some of the thoughtbot vim users but I'm
thinking it better belongs above `DO NOT EDIT BELOW THIS LINE` as custom
configuration for those users.
