[TASK][DOC] Minor typos and entries in the FAQ

Change-Id: I06050480fea889854fb6165130d0ab90f7b53e6f
Reviewed-on: http://review.typo3.org/32359
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>