Add a Sponges.env method

Signed-off-by: chatgris <jboyer@af83.com>
Update README

Signed-off-by: chatgris <jboyer@af83.com>
Less noise with `module_function`

Signed-off-by: chatgris <jboyer@af83.com>
Less noise in require

Signed-off-by: chatgris <jboyer@af83.com>