The tutorial was creating a new address region at +000002 without
removing the previous one, which leaves the 16-bit file load address
sitting at $1000 when it should be non-addressable. The text now
shows the correct procedure. Some screen shots had to be recaptured
to show the greyed-out address field.
This doesn't change anything meaningful about the disassembly -- the
PRG optimization hides the region start/end markers either way -- but
it's more correct this way, and it's an opportunity to introduce
the use of non-addressable regions for file headers.
Biggest changes were to the address region handling in Tutorial1
and the use of StdInline.cs for the inline strings in Tutorial4.
Also, fixed the off-by-one error in Tutorial1.
Added a SourceGen tutorial with lots of screen shots. Uses
"responsive web design" so it works well on mobile devices.
This version is using jQuery load() calls to pull in pieces, but
that causes a lot of blink when loading because the loads are
asynchronous and may not complete until after the initial page
render has finished.
Tutorial prev/next links not yet working.
