~ Write tests for data sources included in TracGViz 1.3.4 that are
not about version control.
+~ Upgrade GViz providers for Trac=1.0 and Apache(TM) Bloodhound.
- Use FSL to select files in GViz providers ?
- Optimize `GVizSourceFileContents` by wrapping VCS file objects
- Export data to Google Spreadsheets.
-- Upgrade GViz providers fot Trac=1.0 and Apache(TM) Bloodhound.