Adding edition tools

To extend the annotation tool, we have added edition tools which will
replace annotation tool. The user can configure the edition capabilities
on layers.
To finish it we have to remove annotation classes and rights.
New feature - Public form to request account

* An option in admin Lizmap > services to activate/deactivate it
* A new item when not logged in lets the visitor access the form
* An email is sent to a configurable admin e-mail for each request