replace the BrowserFrame with NavigateableSinglePage (it's just an iframe yet)
detect scroll events
try to find the current active header
use an imaginary line at the first quarter of the iframe for determining the active header
first steps to parse the navigation for the tutorial from the headers
adding all other chapters to the single page tutorial
add structure to a menu bar
use a huger menu bar for the tutorial
allow selection of a chapter in tutorial
ignore scrolling the first time when the anchor was manually set
updating JQuery
use scrollTop javascript function to jump to chapter
use height of the iframe and not it's content for determining the visible border line
change the root menu caption when the chapter was selected manually
cleaning up HTML and CSS of tutorial
replace most of the "HTML-art" with svg graphics in tutorial and remove unused files
remember last scroll position even if the component was hidden in between
remove the untested possiblity to set the source more than once
get the HTML file from local disk and don't query it with HTTP
shorten the git sha hash sums in info message