Also switch TIFFImagePlugin to logging

[anntzer]

Just some mechanical changes. The remaining file using print is OLEFile,
which has its own logic, but I noticed that @decalage's bitbucket repo has now
switched to using logging as well.

[wiredfool]

Please don't.

Most of the debugging in these is setup for debugging at dev time, not runtime debugging of images that are bad. When something happens with an image, they get dumped into the django logs and they confuse people.

That's been a problem with switching the other devugging to logs, but I think it would wind up being worse for this because most of them are a far lower level of information.

[anntzer]

I don't know what the exact problem is but I'd guess this is just due to people adding a logger at the debug level to the root handler (hey, they're asking for debug info from all librairies...). On the other hand I don't really care either. Feel free to revert #1205 as well.