implemented Field->__get for easier access in twig templates
Merge branch 'develop' of https://github.com/nahakiole/fredyframework into develop
implemented Entity->__get, Entity->__isset and Field->__tostring for convenient access of field values in twig templates
added Entity->isValid and Field->isValid
removed htmlentities() in Text, twig escapes by default
added Datatype\Id, because id's can be null but integers can't
removed Datatype\EMail, Datatype\Mail is the same thing
added min/max to Datatype\Integer and min-/maxLenght to Datatype\Text
Added fullDomainMatch to Router for subdomain matching.