Merge tag '1.0-beta2' into develop

Version 1.0-beta2
Reimplement page type condition.
Reformat code.
Extract specific translations from core package.
Add custom page selection multi-root.
Add the page id condition, extracted from the core component.
Fix group match detection return false, if page is not assigned to any groups.
The acceptep protected status was assigned to the wrong variable.
Page groups must be deserialized.
Require contao/core >=3.2.1,<4-dev now.
Merge branch 'release/1.0.0-beta3'