[gwt-contrib] Allow @Editor.Path("") as a valid annotation to indicate that a sub-editor should be aliased to ... (issue1205801)

[bobv]

Reviewers: rjrjr,

Description:
Allow @Editor.Path("") as a valid annotation to indicate that a
sub-editor should be aliased to the object being edited by its parent
object.
Patch by: bobv
Review by: rjrjr

Please review this at http://gwt-code-reviews.appspot.com/1205801/show

Affected files:
  M user/src/com/google/gwt/editor/client/impl/AbstractEditorDelegate.java
  M user/src/com/google/gwt/editor/rebind/AbstractEditorDriverGenerator.java
  M  
user/src/com/google/gwt/editor/rebind/SimpleBeanEditorDriverGenerator.java
  M user/src/com/google/gwt/editor/rebind/model/EditorAccess.java
  M user/src/com/google/gwt/editor/rebind/model/EditorData.java
  M user/src/com/google/gwt/editor/rebind/model/EditorModel.java
  M  
user/src/com/google/gwt/requestfactory/rebind/RequestFactoryEditorDriverGenerator.java
  M user/test/com/google/gwt/editor/EditorSuite.java
  M user/test/com/google/gwt/editor/client/SimpleBeanEditorTest.java
  M user/test/com/google/gwt/editor/rebind/model/EditorModelTest.java


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