Add a command to start the WebUI using oq
Add a command to start the WebUI using oq

The django development server is started in foreground
on localhost:8800. Meant to be used with multi_user = false
but works also if true.


Former-commit-id: bbfc5549fb632d535ed1934e0d2bd1226ccd4507
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine