Better error handling on settings.ini file
Remove utils module

This module just implemented some common functions already found on
Python standard libraries (like base64 codec and Byte Array to String
conversion functions). Now we are using standard functions, so we can
remove this module.
Reorganize imports

lxml is actually an implicit dependency of BeautifulSoup4 in XML mode,
so let the import live in the project so the error can be explicit
instead of implicit.
Remove CammelCase in decoder.py
Move common functions to a separate module

Better code reuse
Bump version
Last minute fix before new release