merging the readme

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@34623 71c3de6d-444a-0410-be80-ed276b4c234a

readme.txt

 TODO:
-  If a subtask is interrupted, all the executors should be aborted.
+  - If a subtask is interrupted, all the executors should be aborted.
+  - handle AbstractMethodError on methods newly added.
+  - LoadBalancer backward compatibility story.
+  - Document the new abstraction
+  
+
 
   executor rendering.
-    we'd like to sort executors so that WideJobProperty can merge its rendering with parents.
\ No newline at end of file
+    we'd like to sort executors so that WideJobProperty can merge its rendering with parents.