#22 vdk.io.clsFile additional methods

[Jason Ely]

touch
Implements the same behaviour as the "touch" utility on Unix. It creates a new file with size 0 or,
if the file exists already, it is opened and closed without modifying it, but updating the file date and time.

isShortCut
Tests if the file is a shortcut

isSymbolicLink
Tests if the file is a symbolic link

listAllFiles
Lists all the files including files in sub directories for a given directory.

listAllFilesWithName(strName)
Lists all the files including files in sub directories for a given directory where the given parameter matches the name of the file. The name parameter is evaluated as a regular expression meaning that you can filter for file names based on various search criteria.

[Jason Ely]

dev done unit test passed.