add property type "int"

This type was already used in some tests but was not in
PropertyDeclaration::Type.

Change-Id: I560d3967445823357285f5c8dcb1cce58de7b35f
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>
introduce the stringList property type

Change-Id: I268483ffd2f8d093eb1f4f365d0afe4ddad21aa1
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>
consistently use QLatin1String in propertyTypeFromString

Change-Id: I108acea1d09b157c5c9703e2e0e72f45cfe10a8e
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>