Added algorithms section as a macro in the manual.

doc/dynare.texi

@@ -56,6 +56,14 @@
 @emph{Algorithm}
 @end macro
 
+@macro algorithmshead
+@iftex
+@sp 1
+@end iftex
+@emph{Algorithms}
+@end macro
+
+
 
 @macro customhead{title}
 @iftex