Wiki reorganization proposal

Delete:

There are a number of historical/obsolete wiki pages that should be deleted so that they do not mislead or distract anyone. They would be preserved in the wiki history if anyone wants their content.

Merge into README_TOMCAT:

For the wiki homepage:

ArchivesSpace: a next-generation archives management tool - http://www.archivesspace.org/overview

Project process documentation

Technical documentation