message: Update README.md
  Nits around getting started from scratch.  Updated to include nctl instead of rundev.sh
diff: @@ -30,11 +30,17 @@ The Casper Testnet is live.
  This is the core application for the Casper blockchain.
  -## Running a validator node
  +## Running a validator node from Source
  +
  +### Pre-Requisites for Building
  +
  +cmake 3.1.4 or greater
  +
  +[Rust](https://www.rust-lang.org/tools/install)
  ### Setup
  -Before running a node, prepare your Rust build environment, and build the required system smart contracts:
  +Before building a node, prepare your Rust build environment, and build the required system smart contracts:
  ```
  make setup-rs
  @@ -84,7 +90,7 @@ The nodes can take quite a long time to become fully interconnected. This is de
  `network.gossip_interval` value (in milliseconds). Nodes gossip their own listening addresses at
  this frequency.
  -There is a [shell script](run-dev.sh) which automates the process of running multiple nodes on a single machine.
  +There is a [tool](https://github.com/CasperLabs/casper-node/tree/master/utils/nctl) which automates the process of running multiple nodes on a single machine.
  Note that running multiple nodes on a single machine is normally only recommended for test purposes.
  