updated for viewer 2.3.0
updated get requests for viewer 2.3.0
updated to viewer 2.3.0
ANNOTATIONJAVA-177: Test GroupDocs.Annotation samples with updated Viewer library v2.3.0
Updated library version
Updated compile process for possibility to debug project
Fixed GetDocumentPageImageServlet request
Fixed functional for save anonimous user to database
Fixed functional for oped default file
Fixed screen size
ANNOTATIONJAVA-200: CORS headers is not present in Java Web Sample requests
ANNOTATIONJAVA-183: Annotations tool panel is not visible in Java Web Sample
Optimized import
ANNOTATIONJAVA-202: Import functional is not implemented in Java Web sample
ANNOTATIONJAVA-265: Update Java Web sample according to changes in Annotation library
ANNOTATIONJAVA-271: Update `CustomInputDataHandler` class in all Annotation samples
ANNOTATIONJAVA-265: Update Java Web sample according to changes in Annotation library