Itouch basically takes a list of files, and one at a time it stamps them
with the current time and date.  This is a little more convoluted than
using the wildargs functionality, since it was done long before the wildargs
was created.

ARGS.C    - parameter parsing
EXT.C     - file extension handlers
FATAL.C   - fatal error and exit
FILE.C    - generic routines to run a function for each file in the command
          - line list
ITOUCH.C  - main line, command line parsing,
          - and function to do the touch operation
USAGE.C   - usage and banner