prep for b1

CHANGES.txt

@@ -1,4 +1,4 @@
-Next release
+3.0b1 (2010-08-13)
 
   - Use rich comparison methods rather than __cmp__ to sort process
     configs and process group configs to better straddle Python

src/supervisor/version.txt

@@ -1,2 +1,2 @@
-3.0a8
+3.0b1