GS 3.5 chapters 4 & 5 now done

OK, I've done the Getting Started v3.5 chapters on Writer and Calc.
Most changes were not needed to be covered in the GS book. They will
need to be covered in the Writer Guide and Calc Guide, but it looks
like those books won't get done for v3.5.

Now waiting for PeterS to find time to do the Draw chapter, and then
the book is done.

Time to get to work on the books for LO v3.6.

--Jean