Parse HOCON configuration files in Rust
The API docs for the master branch are published here.
```rust let s = r#"{"a":5}"#; let doc = Hocon::loadfromstr(s).unwrap();
asserteq!(doc["a"].asi64().unwrap(), 5); ```
```rust let s = r#"{"b":5, "b":10}"#; let doc = Hocon::loadfromstr(s).unwrap();
asserteq!(doc["b"].asi64().unwrap(), 10); ```
https://github.com/lightbend/config/blob/master/HOCON.md