Update __init__.py

Fix import not working in Python 3.3
Update makernote.py

Fix import not working in Python 3.3
Update utils.py

str / bytes coexistence support
Minor fixes to make it work on py 3.x
str / bytes coexistence support
Merge branch 'master' of https://github.com/velis74/exif-py into develop

Conflicts:
	exifread/tags/__init__.py
	exifread/tags/makernote.py