Add link to advanced training examples rather than duplicating code
Replace see also by table for the functions reading annotations
Move annotation read examples after annotation function table
Improve table and add paragraph about writing annotations
Add small paragraph about plane conversion before upload onto the server
Add missing newline
Fix typos
Improve description of file annotation utility functions
Use verbatim for references to Pixels/Image object
Merge file annotation writing examples into annotation section

- Improve readability of the annotation writing subsection
- Merge Updating file annotation into Writing annotations
Improve description of getImages() by container signature
Homogeneize comments across the MATLAB documentation page
Minor fixes
Remove thumbnail methods from the MATLAB documentation page
Additional fixes suggested by @jburel
Merge pull request #571 from sbesson/rebased/dev_4_4/11681_tobytearray

Document latest OMERO.matlab functions (rebased onto dev_4_4)