Replace "computer" by "communication" in the title, since this basic memo is only about communicating.

Signed-off-by: KheOps <kheops@ceops.eu>
Little phrasing improvement.

Signed-off-by: KheOps <kheops@ceops.eu>
Phrasing improvement

Signed-off-by: KheOps <kheops@ceops.eu>
Specify that OTR plugin has to be activated

Signed-off-by: KheOps <kheops@ceops.eu>
Improve phrasing

Signed-off-by: KheOps <kheops@ceops.eu>