Merge pull request #513 from peitschie/cursor-positions

Keep number of cursor positions in a document identical regardless of annotation display
Add a check for the "webodf" namespace
before looking into it for version information
in the ODFViewerPlugin.
Merge pull request #552 from adityab/odfviewerplugin-version

Fix Viewer crash when loading ODFViewerPlugin
Convenience class for obtaining styling information for elements.
Add more documentation to StyleCache.