Moved function
Performance enhancements
Artscript used identify to check for supported formats in file this
had the disadvange of taking a while when the file was big or when
you had to many. We now compare the file extension to a list making
artscript startup almost instant
If the file has no extension it will be processed using identify.

The new fucntion avoids using mapping functions, instead it just appends
the filename to the list.