Magic-settings

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- Fix bug ValueError on NoneType in modules

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- Added using env optional
- Added README

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- Added init function in BaseSettings
- Marked get_settings as deprecated

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- Added exception DynamicSettingsSourceError

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- Added gitlab-ci configuration
- Added makefile for tests running
- Added \_\_init\_\_ to BaseSettings
- Added temp_set_attributes in BaseSettings

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- Added get_settings in BaseSettings
- Dynamic settings for database removed
- Local settings is optional