readme update

include/amsstring4/amsstring4.hpp

@@ -174,6 +174,10 @@ amsarray<amsstring> splitwhitespace(const amsstring &s);
 amsstring stripwhitespace(const amsstring &s);
 amsstring stripallwhitespace(const amsstring &s);
 
+//splits a string into contiguous sets of alphanumeric characters ignoring non-alphanums
+amsarray<amsstring> splitalphanum(const amsstring &s); //
+
+
 //splits into two guaranteed pieces
 //if an extension separator . is not encountered, the first piece will contain the entire string, the second ""
 amsarray<amsstring> splitext(const amsstring &s);