tmux: Change the status bar background color

Changes the status bar background color to the closest orange that
matches the orage in the Ubuntu color palette at
[http://design.ubuntu.com/brand/colour-palette].

Signed-off-by: Henrique Camargo <henrique@henriquecamargo.com>
tmux: Remove an empty line at the end of the file

Signed-off-by: Henrique Camargo <henrique@henriquecamargo.com>
vim: Change the bg color after the 80th column

The color of the column beyond the 80th column is different to give a
clue to the user that he is writing past the 80th column.

It used to be beyond the 79th because I thought the limit was 80
characters including the line break, but the reasoning behind coloring
differently after the 80 is to be able to view the text in different
environment, even in small screens or terminals. So it is about the text
that you can _see_.

Signed-off-by: Henrique Camargo <henrique@henriquecamargo.com>