WGS84 token fixes

Solves #627 
FYI, when a script changes directory, the directory is changed only in that process.
When the process dies, the calling process is still in the same directory as before the call.
So, unless qt_regenerate_files.sh is sourced, there is no reason to "cd back" to $CURRENT.
[ When sourced, a script is executed in the same process as the calling process. ]

And, one more thing, there is a feature "cd -" that takes you back where you were before you changed directory.
So, you could remove the line with 'CURRENT=$(pwd)' and do 'cd -' instead of 'cd $CURRENT'.
But, as I sail, that 'cd-back' is not necessary (unless the script is sourced).

Just informative,

NTC