Updated release number policy

doc/internal/release.txt

@@ -41,8 +41,8 @@ welcome on the mailing list.
 
 4) The release numbers will follow the X.Y.Z scheme:
 
-   1) We update Z by 1 for normal, multi-yearly releases.
-   2) We update Y for bug fixes, interface changes and/or significant features
+   1) We update Z for small urgent bugs or support for new versions of dependencies.
+   2) We update Y for interface changes and/or significant features
       we wish to publicize.
    3) The Theano v1.0.0 release will be made when the interface is deemed
       stable enough and covers most of numpy's interface.