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:release-date: 2011-12-07 05:00 P.M GMT
:by: Ask Solem
* Adds header support.
Application headers can be added to ``properties["headers"]``.
* Sending messages:
* Supported
* int
* str (not Unicode).
* Unsupported
* everything else. (see read).
* Receiving messages:
* Supported
* boolean: bool
* signed int: i8, i16, i32, i64
* unsigned int: u8, u16, u32, u64
* float: f32
* double: f64
* string: bytes
* Unsupported
* array
* timestamp
* table
* void
* decimal