Twig param typo

auto reload param in config should be named auto_reload. As it does in
twig config.
Extension namespace incomplete

Extension namespace should include the bundle name at the beginning
"Weed" in this case.
Enable bundle config

To allow the bundle to get config parameters from the bundle config
file, it should include "weed::" when we call Config::get
Added "forward" tag

"forward" tag is similar to "include" one, but, forward, executes a
controller and prints its output. Example: {% forward
'bundle::controller@action' %}