add new dev spec

ethcore/src/miner/miner.rs

@@ -1251,7 +1251,7 @@ mod tests {
 
 	#[test]
 	fn internal_seals_without_work() {
-		let miner = Miner::with_spec(&Spec::new_test_instant());
+		let miner = Miner::with_spec(&Spec::new_instant());
 
 		let c = generate_dummy_client(2);
 		let client = c.reference().as_ref();

ethcore/src/spec/spec.rs

@@ -279,7 +279,7 @@ impl Spec {
 	pub fn new_null() -> Spec { load_bundled!("null") }
 
 	/// Create a new Spec with InstantSeal consensus which does internal sealing (not requiring work).
-	pub fn new_test_instant() -> Spec { load_bundled!("instant_seal") }
+	pub fn new_instant() -> Spec { load_bundled!("instant_seal") }
 
 	/// Create a new Olympic chain spec.
 	pub fn new_ethereum_olympic() -> Spec { load_bundled!("ethereum/olympic") }

parity/params.rs

@@ -30,6 +30,7 @@ pub enum SpecType {
 	Olympic,
 	Classic,
 	Expanse,
+	Dev,
 	Custom(String),
 }
 
@@ -49,6 +50,7 @@ impl str::FromStr for SpecType {
 			"morden" | "testnet" => SpecType::Testnet,
 			"olympic" => SpecType::Olympic,
 			"expanse" => SpecType::Expanse,
+			"dev" => SpecType::Dev,
 			other => SpecType::Custom(other.into()),
 		};
 		Ok(spec)
@@ -63,6 +65,7 @@ impl SpecType {
 			SpecType::Olympic => Ok(Spec::new_ethereum_olympic()),
 			SpecType::Classic => Ok(Spec::new_ethereum_classic()),
 			SpecType::Expanse => Ok(Spec::new_expanse()),
+			SpecType::Dev => Ok(Spec::new_instant()),
 			SpecType::Custom(ref filename) => {
 				let file = try!(fs::File::open(filename).map_err(|_| "Could not load specification file."));
 				Spec::load(file)