Update xmonad.hs

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Update vimrc

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Update Xdefaults

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Update gitconfig

Signed-off-by: Lance Chen <cyen0312@gmail.com>