Sebastian Huber b44feffacb eng: Rework preface and add mission statement
Add mission statement based on the wiki page:

https://devel.rtems.org/wiki/Mission_Statement

Do format changes and some rewording.
2020-01-07 07:19:50 +01:00
..
2019-07-24 15:42:29 +02:00

This is a work in process. The initial parts of
RTEMS-Engineering-Standards-v3.docx have been converted to Rest. The
remaining sections need to be converted. And as marked, there are
sections where content from the Wiki needs to be converted to Rest
and included directly here.

--joel