message: Update README.md
  --http-validate-host=0 is required when launching the non-producer or curl requests will fail.
  keosd no longer adds the default private key to the wallet on creation. Manually add.
  Added link to the demo video
diff: @@ -56,12 +56,13 @@ $ ./nodeos -d ~/eos.data/producer_node --config-dir ~/eos.data/producer_node -l
  ### Launch non-producer that will generate transactions
  ```bash
  -$ ./nodeos -d ~/eos.data/generator_node --config-dir ~/eos.data/generator_node -l ~/eos.data/logging.json --plugin eosio::txn_test_gen_plugin --plugin eosio::wallet_api_plugin --plugin eosio::chain_api_plugin --p2p-peer-address localhost:9876 --p2p-listen-endpoint localhost:5555
  +$ ./nodeos -d ~/eos.data/generator_node --config-dir ~/eos.data/generator_node -l ~/eos.data/logging.json --plugin eosio::txn_test_gen_plugin --plugin eosio::chain_api_plugin --p2p-peer-address localhost:9876 --p2p-listen-endpoint localhost:5555 --http-validate-host=0
  ```
  ### Create a wallet on the non-producer and set bios contract
  ```bash
  $ ./cleos wallet create
  +$ ./cleos wallet import --private-key 5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3
  $ ./cleos set contract eosio ~/eos/build.release/contracts/eosio.bios/
  ```
  @@ -83,3 +84,6 @@ eosio generated block b243aeaa... #3221 @ 2018-04-25T16:07:48.000 with 500 trxs,
  ```
  Note in the console output there are 500 transactions in each of the blocks which are produced every 500 ms yielding 1,000 transactions / second.
  +
  +### Demonstration
  +The following video provides a demo: https://vimeo.com/266585781
  