Add the earliest of the three linearly-related versions.

These files were in Fractals/FinalWithGroup in the backup.
Add the second of the three linearly-related versions.

These files were in FINAL in the backup.

The files were called 'FINAL*'. I renamed them to '*', fixing imports
accordingly.
Add the third of the three linearly-related versions.

These files from the were in the web page in the backup, also copied
to web-page/bin here.

Again, renamed 'FINAL*' to '*'.
Remove useless file 'converter.cpp'.

The 'converter.cpp' functionality -- to convert a .nrd file to a
bitmap -- is duplicated in 'julia.cpp'.
Add 'Makefile'.
Fix outdated dependencies.

According to this SO answer

  http://stackoverflow.com/a/3698305/470844

our use of '#include <iostream.h>' instead of '#include <iostream>'
corresponds to C++ before the 1998 standard ...

The standardized headers put all names in the 'std' namespace.
Remove 'bitmapwriter.h', which will be replaced by libpng++.

The 'bitmapwriter.h' included the 'nrd2bmp' function for converting
from our bitmap format to standard bitmap format.  Using libpng++ we
don't need either.
Make 'julia.cpp' build.

- eliminate the 'nrd2bmp' step;
- fix imports in 'functions.h';
- make 'main' return 'int'.
Note dependency on libpng++.
Use libpng++ instead of "nrd" format.

With this commit we're generating images again, now in PNG format.
The use of libpng++ is dead simple here!

I'm going to change 'julia.cpp' to use command line args instead of
prompting, and then do more tests.  So far, it seems that "slow mode"
is actually faster, and is responsible for all the interesting "tails"
in the generated image. I guess this means that most non-diverging
points are recurrent!