Fixes and improvements for PoC-1 Testnet (#143)

* Fix initialisations and add a test.

* Fix test.

* Fix overflow bug.

* Minor refactoring and fixes.

* Fix vote threshold.

* Add note.

* Fixes for latest rust and the readme.

* Better readme.

* An extra validator for PoC-1

* Update README.

* PoC-1 bootnodes.

* don't return async::notready for messages without scheduling wakeup

* Fix endowed account

* give polkadot control over round proposer based on random seed

* address grumbles.

polkadot/cli/src/cli.yml

@@ -56,6 +56,6 @@ args:
   - chain:
       long: chain
       value_name: CHAIN_SPEC
-      help: Specify the chain specification (one of dev or poc-1)
+      help: Specify the chain specification (one of dev, local or poc-1)
       takes_value: true
 subcommands:

polkadot/cli/src/lib.rs

@@ -126,13 +126,15 @@ pub fn run<I, T>(args: I) -> error::Result<()> where
 	}
 
 	match matches.value_of("chain") {
-		Some("poc-1") => config.chain_spec = ChainSpec::PoC1Testnet,
 		Some("dev") => config.chain_spec = ChainSpec::Development,
+		Some("local") => config.chain_spec = ChainSpec::LocalTestnet,
+		Some("poc-1") => config.chain_spec = ChainSpec::PoC1Testnet,
 		None => (),
 		Some(unknown) => panic!("Invalid chain name: {}", unknown),
 	}
 	info!("Chain specification: {}", match config.chain_spec {
-		ChainSpec::Development => "Local Development",
+		ChainSpec::Development => "Development",
+		ChainSpec::LocalTestnet => "Local Testnet",
 		ChainSpec::PoC1Testnet => "PoC-1 Testnet",
 	});