add tests, add to README.

README.md

@@ -31,7 +31,14 @@ Extend rusty-wam to include the following, among other features:
 * Mode declarations.
 * Extensions for clp(FD).
 * `if_` and related predicates, following the developments of the
-  paper "Indexing `dif/2`".
+  paper "Indexing `dif/2`".  
+* Strings, blobs, and other data types typical of Prolog that may not yet
+  know of or have left out.
+  
+## Phase 3
+
+Use the WAM code generated by the completed code generator to target LLVM
+IR to get JIT-compiled and -executed Prolog programs.
 
 ## Tutorial
 To enter a multi-clause predicate, the brackets ":{" and "}:" are used