Fix link to appendix / 2004 user conference materials

[scw]

From Florence Wong:

The document mentioned in page 1 of the tutorial PDF goes to a broken link. Pls consider including a copy of the document in the tutorial folder.

"To learn more about the original tool development and its applications in natural resource mapping and coastal management please refer to the BTM document located at the link below. More resources including information on BTM product development and community support can be found in the appendix. http://proceedings.esri.com/library/userconf/proc04/docs/pap1433.pdf "

Florence

[scw]

Looks like the paper is available online. That said, it's quite old and we may be better served by improving the tutorial to include the relevant details, and include new references to work done in the past decade to improve BTM beyond its original core.