bring ob-fortran into the core -- FSF assignment completion

  Thanks to Sergey Litvinov for contributing this language support!

* lisp/ob-fortran.el: Adding support for Fortran code blocks.
* Makefile (LISPF): Compile Fortran support.
* lisp/org.el (org-babel-load-languages): Adding fortran to this list.

Makefile

@@ -159,7 +159,8 @@ LISPF      = 	org.el			\
 		ob-scheme.el		\
 		ob-lilypond.el		\
 		ob-java.el		\
-		ob-shen.el
+		ob-shen.el		\
+		ob-fortran.el
 
 LISPFILES0  = $(LISPF:%=lisp/%)
 LISPFILES   = $(LISPFILES0) lisp/org-install.el

lisp/org.el

@@ -164,6 +164,7 @@ requirements) is loaded."
 		 (const :tag "Ditaa" ditaa)
 		 (const :tag "Dot" dot)
 		 (const :tag "Emacs Lisp" emacs-lisp)
+		 (const :tag "Fortran" fortran)
 		 (const :tag "Gnuplot" gnuplot)
 		 (const :tag "Haskell" haskell)
 		 (const :tag "Java" java)