Allow Parity as ingest node (#36)

* Upgrade go-ethereum to v1.8

* Add Node Info for parity nodes

* Upgrade start_private_blockchain to use v1.8

db/migrations/1520289493_update_eth18_types.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE blocks
+  ALTER COLUMN size TYPE BIGINT USING size::BIGINT;

db/migrations/1520289493_update_eth18_types.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE blocks
+  ALTER COLUMN size TYPE VARCHAR USING size::VARCHAR;

db/schema.sql

@@ -77,7 +77,7 @@ CREATE TABLE blocks (
     hash character varying(66),
     nonce character varying(20),
     parenthash character varying(66),
-    size bigint,
+    size character varying,
     uncle_hash character varying(66),
     node_id integer NOT NULL,
     is_final boolean,