This is the initial commit of the okeanos-helpdesk branch.
The main purpose of this branch is to:
* Move non-technical parts (e.g examples) to the okeanos-guides docs,
  where they can be presented in a more user-oriented way
* Correct minor omissions that okeanos-helpdesk has encountered during
  the testing of the image-creator tool

Fix various typos in messages, add .gitignore file for
automatically produced intermediate files.