Raise/lower now work more or less correctly, there is some slowness when raising a large section (could be optimised) needs testing to ensure behaviour is correct
Raise/lower now work more or less correctly, there is some slowness when raising a large section (could be optimised) needs testing to ensure behaviour is correct

git-svn-id: 1c5f0d70b70358869d03d7859daa03e4e3c53617@135 741c516a-3ba6-4fa8-b112-5c51f26a88df

tbentropy/pytile