Move `aeronmd` back out of -sys.

Clap/Ctrlc are still causing issues during static link.

aeron_driver-sys/Cargo.toml

@@ -13,9 +13,5 @@ bindgen = "0.51"
 cmake = "0.1"
 dunce = "1.0.0"
 
-[dev-dependencies]
-clap = "2.33"
-ctrlc = "3.1"
-
 [features]
 static = []

examples/aeronmd_sys.rs

@@ -1,7 +1,6 @@
 //! Media driver startup example based on
 //! [aeronmd.c](https://github.com/real-logic/aeron/blob/master/aeron-driver/src/main/c/aeronmd.c)
 //! This example demonstrates direct usage of the -sys bindings for the Media Driver API.
-//! The main crate has a more Rust-idiomatic example usage.
 
 use aeron_driver_sys::*;
 use clap;