Add a script to produce dojo-mini build to buildscripts

[dante]

A ticket to close when I checkin the script adapted from

http://www.sitepen.com/blog/2008/04/02/dojo-mini-optimization-tricks-with-the-dojo-toolkit/

to be considered as the default release build (test package external?) or as an option for users during build with the intent of embedded deployment.

[dante]

(In [13414]) fixes #6615 - adds dojo-mini script into buildscripts/ with many warnings and notices, though is working as expected. refs #6609 in the sense I modidied the "official" copyright notice to be a generic url that will be more easily maintainable. I've added a "shorthand" copyright_mini.txt file used in minification, though basically retains all english wording from the original. Both of those notes ref #6616 - in that there is some copying going on touching actual source tree files before and after build until those options are available from the command line, to preserve the user's ability to use custom profiles and this script together.