Add ImportNode() to XmlDocument.
Remove problematic optimization for local base class properties.
Merge branch 'add_import_node' into cc
Merge branch 'remove_app_optimization' into cc
When a compilation error occurs, fail any of the tests that are based on that compilation.
Add tests for base methods, properties, and indexes.
Fix some whitespace.
Merge branch 'add_tests_for_bases' into cc
Merge branch 'fail_on_compiler_error' into cc