Update README.md to be little more descriptive.
@@ -120,3 +120,5 @@ Java implementation of algorithms from [Russell](http://www.cs.berkeley.edu/~rus
|22.1|871|HITS|[HITS](/aima-core/src/main/java/aima/core/nlp/ranking/HITS.java)|
|23.5|894|CYK-Parse|[CYK](/aima-core/src/main/java/aima/core/nlp/parsing/CYK.java)|
|25.9|982|Monte-Carlo-Localization|[MonteCarloLocalization](/aima-core/src/main/java/aima/core/robotics/MonteCarloLocalization.java)|
+
+### "---" indicates algorithms yet to be implemented.
