Allow UploadHandler class and backup_files() to be passed log param
Allow UploadHandler class and backup_files() to be passed log param

I'm importing these methods and using them in a larger construct
where it's very useful for me to set up my own logging.  I figure
I may not be the only one.

russss/tablesnap,heroku/tablesnap,tamsky/tablesnap,juiceblender/tablesnap,juiceblender/tablesnap,curalate/tablesnap,russss/tablesnap,apigee/tablesnap,apigee/tablesnap,JeremyGrosser/tablesnap,amorton/cassback,JeremyGrosser/tablesnap,betable/tablesnap,ethanmiller/tablesnap,betable/tablesnap