improve layout of sidebars by adding some padding and magic whitespaces at a few places (what a hack - don't ttouch or it will fall apart)
insert manual page break at the right place to make sidebar top-aligend (i.e. more hackery)
consistenly add a newline before the (cont'd)
further layout / sidebars fixes in chapter 3
fix layout of sidebars in chapter 4
text should not flow around the sidebar (for consistency with other sidebars in later chapters)
justify last line of paragraph before the manually introduced pagebreak
finish sidebars in chapter 5, adapt formatting in earlier chapters for consistency