New Deadwood snapshot: Parser bugs fixed

I have been uploading new Deadwood snapshots to fix some bugs in the dwood3rc parser; the parser now has the += (append) operator work correctly with dictionary variables, as well as having more stringent controls for dictionary indexes (dictionary variables must be initialized; a dictionary index can not be appended to without first being set; etc.) so that dwood3rc files must be working Python 2 scripts to correctly parse.

In addition, I have refined the documentation a little.

They can be looked at here:

http://maradns.org/deadwood/snap/