LoF qa #4502

1. Resized full images.  SV list set to full will give you up to 600x600.  file/$fid full view goes up to 1000x1000.
2. List of images with thhumbnail view links each thumb to the file view.
3. Removed html as a file content type.
Cleaned up some useless funcs, finished plugin docs #4502
Merge pull request #4687 from openscholar/4502-lof_qa

4502 lof qa