python/RBTools: Wrap README at 72 columns.

Signed-off-by: B. Watson <yalhcru@gmail.com>

python/RBTools/README

@@ -1,11 +1,13 @@
-RBTools is a collection of console utility scripts for use with Review Board.
+RBTools is a collection of console utility scripts for use with Review
+Board.
 
 This consists of the following officially supported tools:
 
-    * post-review - Create and update review requests based on changes in
-                    a local tree.
+* post-review - Create and update review requests based on changes in
+                a local tree.
 
-There are also some user-contributed scripts and application plugins in the
-contrib directory. See the associated README files for more information.
+There are also some user-contributed scripts and application plugins
+in the contrib directory. See the associated README files for more
+information.
 
 This release works with Review Board 1.7.3.