DS-1766 Use simple access step by default

Also added some documentation around the option, re-ordered access step
options, normalised whitespace and commented them out by default. The JSPUI and
XMLUI code already use a default value of 'false', so no code changes needed.
Merge pull request #381 from aschweer/DS-1766-simple-embargo

DS-1766 Use simple access step by default