Added two static methods to create a list of TFileInfo's:

   TList *TFileInfo::CreateList(const char *file)

where 'file' is a text file with each line defining a file URL

   TList *TFileInfo::CreateListMatching(const char *files)

where 'files' is
   i)   directory path; all regular files in the directory are added
   ii)  a file path; a list with a single element is created
   iii) a file-path containing wildcards '*' in the file name; a list with
        all the files consistent with the path are added.


git-svn-id: http://root.cern.ch/svn/root/trunk@18621 27541ba8-7e3a-0410-8455-c3a389f83636