vimrc: put GUI settings inside has("gui_running")

Vim will try to resize the terminal if the lines or columns value is not
the same as the current value, which we don't want.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
gitconfig: add an alias to import patches with predictable SHAs.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>