usb: add usb driver

Signed-off-by: Micky Ching <mickyching@gmail.com>
gh-pages: not exclude html files

Signed-off-by: Micky Ching <mickyching@gmail.com>
gh-pages: publish emacs configuration

Signed-off-by: Micky Ching <mickyching@gmail.com>
gh-pages: publish git and C++

Signed-off-by: Micky Ching <mickyching@gmail.com>
gh-pages: default show all in html files

Signed-off-by: Micky Ching <mickyching@gmail.com>
css: modify stylesheets

Signed-off-by: Micky Ching <mickyching@gmail.com>