Make webactivity compatible with webkit1

If a env variable SUGAR_USE_WEBKIT1 exists,
uses a local webserver, borrowed from wikipedia activity.
Other compatibility changes are needed, like variables and methods
names.
When use webkit1 the web inspector is not enabled, because do not work.

Signed-off-by: Manuel Quiñones <manuq@laptop.org>
Signed-off-by: Gonzalo Odiard <gonzalo@laptop.org>