Dmitry Tantsur 864c498528 Fix rendering in README
It is included into doc/source/index, so its heading levels have to be
compatible with ones there. The same goes for MISSION.

Also fixes incorrect link syntax.

Change-Id: I71f575b72abad0c5992be841ac3ee5ea1094537d
2017-08-11 11:34:49 +02:00
..
2017-08-11 11:34:49 +02:00