Ad Hoc Figment

An ad hoc provider for the [figment] configuration library.

```rust use figment::Figment; use adhoc_figment::AdHocProvider;

fn main() { let adhoc = AdHocProvider::new("key", "value"); let figment = Figment::from(adhoc); let value: String = figment.extractinner("key").unwrap(); asserteq!(value, "value"); } ```