Overload method/function "FileHeaderTest" with Data Type file and String

[friesey]

It should be possible to perform the PdfUtilities.FileHeaderTest-function with files and Strings. Right now it is only possible with the data type file.
Function should be overloaded.

[friesey]

Well, that's done now, but somebody should check if it was done in a good way (see "PdfUtilities").