Added a .gitignore file.

Added a gitignore file. To not "spill" extra personal information and to not add
automatically generated files by accident.

Signed-off-by: Bart Kerkvliet <bkerkvliet@gmail.com>
Added Mutt config.

Added the Mutt configuration files.

Signed-off-by: Bart Kerkvliet <bkerkvliet@gmail.com>
Upstream PowerLine.

Updates upstream.

Signed-off-by: Bart Kerkvliet <bkerkvliet@gmail.com>