Provide documentation upload facilities

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Check only the url file extension to detect whether or not we have to use the template.

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Add hints for windows users

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>