Some improvements
Some corrections
Added get Stream options wrapper
Skip validation for replicated models
Update Page type / field management with new streams cp
Added slugExist() method to PageType model
Field model improvements
FieldAssignment model improvements
Stream model improvements
Fix pagination method on AbstractCp
Cp\Fields and Data\Fields improvements
assignments view improvements
Use form_slug property in pyro_lang field type
Merge pull request #3003 from obrignoni/2.3/develop

2.3/develop
Fix Pages, including deleting page types
Pass records per page setting to pagination
Fix field parameters
Added delete() method to EloquentCollection
Update choice field type
Unique custom parameter keys