The grand language renaming bonanza (#3278)

* Removing FORTRAN samples because OS X case-insensitive filesystems :-\

* Adding Fotran samples back

* FORTRAN -> Fortran

* Groff -> Roff

* GAS -> Unix Assembly

* Cucumber -> Gherkin

* Nimrod -> Nim

* Ragel in Ruby Host -> Ragel

* Jade -> Pug

* VimL -> Vim script

samples/Fortran/sample2.f

@@ -0,0 +1,25 @@
+      PROGRAM MAIN
+
+      END
+
+C comment
+* comment
+
+      SUBROUTINE foo( i, x, b )
+      INTEGER            i
+      REAL               x
+      LOGICAL            b
+
+      IF( i.NE.0 ) THEN
+         CALL bar( -i )
+      END IF
+
+      RETURN
+      END
+
+      DOUBLE COMPLEX FUNCTION baz()
+
+      baz = (0.0d0,0.0d0)
+
+      RETURN 
+      END