Export more symbols

Author: alessiostalla

pylasu/model/__init__.py

@@ -1,5 +1,5 @@
 from .model import Destination, Node, Origin, internal_field, internal_properties
 from .naming import Named, PossiblyNamed, ReferenceByName
-from .position import Point, Position, pos
+from .position import Point, Position, pos, Source
 from .traversing import walk, walk_ancestors, walk_descendants, walk_leaves_first
 from .processing import children, search_by_type

pylasu/validation/__init__.py

@@ -1 +1 @@
-from .validation import Issue, IssueSeverity, IssueType
+from .validation import Issue, IssueSeverity, IssueType, Result