- fix changeset links which were not following copies
- put ''blame'' annotation before ''line'' annotation. In order to achieve that, preserve the order of annotations given to Mimeview.render.
Even smaller changes:
- document the implementation of IHTMLPreviewAnnotator
- logging rendering attempts made more robust (empty annotations list supported)
- another small fine tuning for the color code
- when browsing at fixed revision, use that revision's age for selecting the newest date for the color code.
- browser template: use directly Node objects as `entries` in render_dir
