initail changes to get improved generaloption section names
add version option control
fix unittests with updated fancylogger
add get_options_by_prefix and unittest
Don't add group with opt_dict equal to None
clarify opt_dict = None usage
add support for default loglevle, configfiles and ignoreconfigfiles
test the DEFAULT_LOGLEVEL
fix generation of docstring based description
fix typo
small aesthetic fix
Merge pull request #30 from stdweird/global_loglevel

some more features