Makefile set to programming type
Merge pull request #1724 from pchaigno/make-type

Programming type for Makefile
Fix tests for Makefile change
Update the URL for the source.pike grammar

It's now hosted on GitHub and has a clearer license.
Merge pull request #1728 from github/new-pike-url

Update the URL for the source.pike grammar
Merge pull request #1726 from github/makefile-tests

Fix tests for Makefile change
Add Forth extension .fr; and a sample.