Fixed index overrun when reaching end of buffer

Signed-off-by: John Dulaney <jdulaney@fedoraproject.org>
Add normal mode enter key support

Signed-off-by: John Dulaney <jdulaney@fedoraproject.org>
Fix line motion deletion

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Truncate lines that are too long

This is temporary. urwid blows up hard when we don't do it.

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
First pass enter functionality in insert mode

Signed-off-by: John Dulaney <jdulaney@fedoraproject.org>
Merge remote-tracking branch 'dulaney/master'