Added information about Geth and Parity (#22)

README.md

@@ -71,6 +71,19 @@ etheno https://client1.url.com:1234/ https://client2.url.com:8545/ http://client
 * `--run-publicly` allows incoming JSON RPC connections from external computers on the network
 * `--debug` will run a web-based interactive debugger in the event that an internal Etheno client throws an exception while processing a JSON RPC call; this should _never_ be used in conjunction with `--run-publicly`
 * `--master` or `-s` will set the “master” client, which will be used for synchronizing with Etheno clients like Manticore. If a master is not explicitly provided, it defaults to the first client listed.
+* `--raw`, when prefixed before a client URL, will cause Etheno to auto-sign all transactions and submit then to the client as raw transactions
+
+### Geth and Parity Integration
+
+A Geth and/or Parity instance can be run as a private chain with
+* `--geth` or `-go` for Geth
+* `--parity` or `-pa` for Parity
+
+Each will be instantiated with an autogenerated genesis block. You may provide a custom `genesis.json` file in Geth format using the `--genesis` or `-j` argument. The genesis used for each run will automatically be saved to the log directory (if one is provided using the `--log-dir` option), or it can be manually saved to a location provided with the `--save-genesis` option.
+
+The network ID of each client will default to 0x657468656E6F (equal to the string `etheno` in ASCII). This can be overridden with the `--network-id` or `-i` option.
+
+EIP and hard fork block numbers can be set within a custom genesis.json as usual, or they may be specified as commandline options such as `--constantinople`.
 
 ### Ganache Integration