d3-core 0.1.0

# Rust Core Runtime for D3 -- A Framework for Server Development

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The core runtime for the d3 framework. d3-core is a companion to d3-derive and d3-components.
Combined, they form a framework for server development.

## Usage

Add this to your `Cargo.toml`:

```toml
[dependencies]
d3 = "0.1.0"
```

## Example
```rust
#[macro_use]
extern crate d3_derive;

// A trivial instruction set
#[derive(Debug, MachineImpl)]
enum StateTable { Init, Start, Stop }

// A trivial Alice
pub struct Alice {}

// Implement the Machine trait for Alice
impl Machine<StateTable> for Alice {
     fn receive(&self, cmd: StateTable) {
     }
}

// create the Machine from Alice, getting back a machine and Sender<StateTable>.
let (alice, sender) = executor::connect(Alice{});

// send a command to Alice
// Alice's receive method will be invoked, with cmd of StateTable::Init.
sender.send(StateTable::Init).expect("send failed");
```