Removed outdated Palaso.sln and re-made my changes in the 2010 solution that is actually being used.
Add a gecko-based implementation of ThumbnailViewer

This is useful in applications using Gecko, since the old
ListView version suffers from a sticky scroll thumb when
a GeckoFx windows is in use.
Cleanup after review

- Added a lazy-load trick to make first page come up faster
- Make wait cursor stay until load complete (not entirely successful)
- Added a unit test as another way of trying the gecko version
- reduce the white space between images
- improve some comments
Merge pull request #136 from JohnThomson/webThumbnailer

Add a gecko-based implementation of ThumbnailViewer