Add a shell script to verify the conversion result for all heads in a multi-branch repo.

tools/verify-all-heads.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+for b in `hg branches | cut -f 1 -d ' '` ; do
+    hg co $b || break
+    echo Verifying $b
+    $(dirname $0)/bisect-find-bad.sh > /dev/null || break
+    echo $b Verified.
+done