#2 document the installation steps for dynamide in tomcat

[Laramie Crocker]

dynamide takes over tomcat, in that all URLs are sent to the DynamideServlet, except for static links updated in server.xml .

So we need to document:
1) how to pull down tomcat, which version, etc.
2) which files to modify, tomcat-users.xml, server.xml, etc.
3) which libs we mess with. Dynamide build-91 for example, requires that we put stuff in shared/lib because Beanshell needs to be loaded in the shared loader. This is non-standard behavior, and critical to dynamide working, so should be documented clearly.

The final artifact should be referenced in INSTALLING.txt. It is currently sketched out in INSTALLING-tomcat.txt .