tests for this are on elasticsearch branch (due to huge refactoring
there) and will come later by merge

Update apps-advanced.md

Should run migration to import yii tbl_user if not the sign up/login may report error.

implements #563 - revokeAll()

for consistency with paginiation

Added link to new RBAC page

Basic documentation about RBAC

[WIP] Redis ActiveRecord

also removed composer plugin and added it to requirements
this way the plugin is recognized by composer. would not work otherwise.

setting the repo type to yii2-extension also allows us to run composer
plugin and let it handle the extensions in this package