Solved #2 by serving request in #89: Adopted the griffon layout (which basically is the default asciidoctor layout) and fixed the missing font imports
removed todo-tag (https://github.com/aim42/aim42/issues/94)
removed TODO (already an github issue)
* cleaned up a few todos, explicit assumptions, extimate in intervalls.
* removed "determine feature value" (as we have "estimate-feature-value" instead!)
* corrected atam-figure reference
improved "introduce layering", removed TODO in index
clarified "Take-what-they-mean", enhanced description a bit... link to <<Fast-Feedback>>
first round of [pattern]#xxx# in pattern-index
added [pattern]#xx# to even more patterns/practices in index.
explain footnote
streamlined the text just a little, removed a few "the", introduced footnote (eval vs analysis)
removed redundant [pattern]# statements... as we don't want layout info scattered within the text.