twelf 0.15.0

Twelf is a configuration solution for Rust including 12-Factor support. It is designed with layers in order to configure different sources and formats to build your configuration. The main goal is to be very simple using a proc macro.
Documentation 
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{
    "test": "from file",
    "another": 25,
    "elements": {
        "key": "value",
        "key2": "value2"
    },
    "elements_def": {
        "key": "value",
        "key2": "value2"
    }
}