made the pack completely portable and wrote relevent bat files to go with it

gitportable/mingw64/lib/tk8.6/demos/hello

@@ -0,0 +1,22 @@
+#!/bin/sh
+# the next line restarts using wish \
+exec wish86 "$0" ${1+"$@"}
+
+# hello --
+# Simple Tk script to create a button that prints "Hello, world".
+# Click on the button to terminate the program.
+
+package require Tk
+
+# The first line below creates the button, and the second line
+# asks the packer to shrink-wrap the application's main window
+# around the button.
+
+button .hello -text "Hello, world" -command {
+    puts stdout "Hello, world"; destroy .
+}
+pack .hello
+
+# Local Variables:
+# mode: tcl
+# End: