Update installation instructions for clone

Author: Ryan Delaney

README.rst

@@ -23,7 +23,7 @@ a clone does not do this automatically:
 ::
 
     git clone git@github.com:rpdelaney/python-chess-annotator.git
-    cd python-chess-annotator/
+    cd python-chess-annotator/annotator/
     git submodule init eco
     git submodule update eco