[CORE] fix maskLevel is set with group id while it should be group level

See #144
Merge pull request #159 from ozon/improvements/find_plugin_cfg

[core] Try to guess plugins configuration file if missing or incorrect
Merge pull request #161 from FenixXx/release-1.10

[iourt42] updated Radio call regular expression
Merge pull request #150 from thomasleveil/fix/group_level_in_mask_level

fix maskLevel is set with group id while it should be group level
add json output
reformat code to be closer to PEP 8
Merge pull request #160 from ozon/features/help-json_output

[core] add json output for autodoc