Move touch.py out of voussoirkit, into voussoir/cmd.

Within voussoirkit, the solution for touching a single file is
pathclass.Path.touch.

voussoirkit/touch.py

@@ -1,34 +0,0 @@
-'''
-Create the file, or update the last modified timestamp.
-'''
-import argparse
-import os
-import sys
-
-from voussoirkit import pipeable
-from voussoirkit import winglob
-
-def touch_argparse(args):
-    patterns = [pattern for arg in args.patterns for pattern in pipeable.input(arg)]
-    for pattern in patterns:
-        filenames = winglob.glob(pattern)
-
-        if len(filenames) == 0 and not winglob.is_glob(pattern):
-            open(pattern, 'a').close()
-            print(pattern)
-
-        for filename in filenames:
-            os.utime(filename)
-            print(filename)
-
-def main(argv):
-    parser = argparse.ArgumentParser(description=__doc__)
-
-    parser.add_argument('patterns', nargs='+')
-    parser.set_defaults(func=touch_argparse)
-
-    args = parser.parse_args(argv)
-    return args.func(args)
-
-if __name__ == '__main__':
-    raise SystemExit(main(sys.argv[1:]))