[Hexmap-user] Updated perl demo

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Here's an updated version of the demo code for the perl bindings. This takes into
account one change in the perl version of the API. It also has the images
directly in the code. I've also attached a utility script for converting
xpm images to perl structures.

The perl module API can now be regarded as stable. It basically mimics the
C API, with a few exceptions, so you should be able to mostly follow the
C documentation. The major exception is HexList, which is a linked list
in C, but is represented in the perl modules as a tied hash (keyed on
depth).

If you have any questions, or bug reports, or whatever, please let me know.

Ron Steinke