Updated all files to reflect ITS db access

ITS provides a file called `SiteConfigVars.php` to find the database
hostname and password.  The database user is called "w-hon" and
the database is named "w_hon".

I changed `poems.php` to `index.php` and edited it so it will work 
without modification on the ITS environment.  I also created a
dummy `SiteConfigVars.php` that can emulate the real library
while testing PoemCollector locally.