Added template for article list pages.
Started on get-articles function.
Added %get-articles function; removed %get-article-count function.
1) Added falsify & cull-null functions to modify data w/ null values.
2) Separated get-article-series query from get-article-* queries.
3) Refactored %get-article-* functions.
Updated templates.
Added get-articles proc to cav-db interface.
Refactored demo program.