Updated working version number to 3.6.6-SNAPSHOT
#3222 fixed layout of figures
#3222 many small fixes to docu. Mainly layout and figure numbering
#3222 chapter 9 fixed figure numbering
#3222 more layout fixes, ch11
#3222 fixed the layout and figure references of ch11 and ch12
#3222 fixed layout ch9
#3222 removed ch9, it was duplicate of ch11
#3222 completed the basic layout update on the document
#3222 added section on Server GUI
#3222 added more docu on the HumanGUI. Needs to be cleaned up, it's too
much a raw copy from the BW4T3 manual still.
#3222 layout of ch6
#3222 final fixes to the instructions document.