Matlab additional fixes

This PR fixes most of the issues raised by @jburel in https://github.com/openmicroscopy/ome-documentation/pull/571#issuecomment-29891337

- remove the thumbnails section from the documentation
- homogeneize the use of ellipsis
- homogenise the comments in the code snippets
- improve description of `getImages()` when specifying container ids
- various minor fixes
- additionally, the extra code snippet for the creation and linking of `FileAnnotationI` is merged into the ``Writing Annotations`` subsection and so it the ``Updating File Annotation`` subsection for clarity.