TREFF: Create a function for returning the path to the Google Maps js file
TREFF: Break jsfunctions into smaller, more personalized files.
TREFF: Update headers to use the new js files
TREFF: Guarantee the idHash is unique by disallawing users to invite themselves to a Treff
TREFF: Remove checkStat()

Instead, do the logic within treff.php
TREFF: Rename js function to be more clear
TREFF: Add single quotes around idHashes since they are varchars
TREFF: Remove the chack for POST['create']

I found the submit button is not always POSTed, therefore, is an
unreliable check.