[PythonCAD] Small fixes for fourteenth release and new stuff at repo

[Somerlot, Chris]

I'm having trouble getting a fresh checkout from the repo going. I get
these errors:

  File "C:\Python23\Lib\site-packages\PythonCAD\Generic\acline.py", line
667
     for _node in self.getNodes(_x, _y, _angle)
                                               ^
 SyntaxError: invalid syntax

And...

  File "C:\Python23\Lib\site-packages\PythonCAD\gtkpycad.py", line 323,
in main
    img = Interface.Gtk.gtkimage.GTKImage()
AttributeError: 'module' object has no attribute 'GTKImage'

Not sure why the last one is occuring.

Also, it turns out the reason files can't be written or saved on windows
is because fileio.py does not open them as binary, like the Gzip class
in gzip.py does. Adding the following at line 45 solves the problem:

        if mode and 'b' not in mode: 
            mode += 'b'


Chris