Add a shell script to update tox' Django checkouts
fix for issue #466, h2 not shown when dragging
Fix #445: Signed/unsigned problem with MySQL 5.5

This should work fine as long as page trees aren't nested to several
dozens of levels...
Merge branch 'master' into next

* master:
  Fix #445: Signed/unsigned problem with MySQL 5.5
  fix for issue #466, h2 not shown when dragging