copy exif information to resized pictures. fix for #6
Merge branch 'master' of github.com:leocrawford/picasawebsync

Conflicts:
	README.md
Merge branch 'master' of github.com:leocrawford/picasawebsync

Conflicts:
	picasawebsync.py
Merge remote-tracking branch 'upstream/master'
exif headers on shrunk pictures are sometimes lost if a file handle is used