Add brief HACKING.md, and update name.

Each release gets names by a new contributor: this one thanks to
Anthony Towns!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

HACKING.md

@@ -0,0 +1,74 @@
+Welcome, fellow coder!
+
+This repository contains a prototype for testing the lightning protocols.
+
+Getting Started
+---------------
+It's in C, to encourage alternate implementations.  It uses the Linux
+coding style.  Patches are welcome!  Just look for FIXME if you want
+ideas.
+
+To read the code, you'll probably need to understand ccan/tal: it's a
+heirarchical memory allocator, where each allocation has a parent, and
+thus lifetimes are grouped.  eg. a 'struct bitcoin_tx' has a pointer
+to an array of 'struct bitcoin_tx_input'; they are allocated off the
+'struct bitcoind_tx', so freeing the 'struct bitcoind_tx' frees them
+all.  Tal also supports destructors, which are usually used to remove
+things from lists, etc.
+
+The daemon uses async io (ccan/io): you register callbacks and they
+happen once I/O is available, then you return what to do next.  This
+does not use threads, so the code flow is generally fairly simple.
+
+Here's a list of parts, with notes:
+
+ccan/ - useful routines from http://ccodearchive.net
+      - Use make update-ccan to update it.
+      - Use make update-ccan CCAN_NEW="mod1 mod2..." to add modules
+
+bitcoin/ - bitcoin script, signature and transaction routines.
+	 - Not a complete set, but enough for our purposes.
+
+secp256k1/ - a copy of libsecp256k1.
+	   - TODO: Replace this will the library once 1.0 is well distributed.
+
+test/ - A few standalone test programs
+	- test_onion: C code to generate and decode the routing onion
+	  (Obsolete; will replace with Sphynx!)
+	- test_state_coverage: routine to test state machine.
+
+daemon/ - The start of a lightningd daemon and lightning-cli
+
+	Networking and comms:
+	- cryptopkt: cryptographic handshake and comms routines.
+	- dns: async dns lookup
+	- netaddr: wrapper type for network addresses.
+
+	JSON and command support:
+	- jsmn/ : a "minimalistic JSON parser" from http://zserge.com/jsmn.html
+	- json: simple wrappers around jsmn for parsing and creating JSON
+	- jsonrpc: routines for handing JSON commands (async).
+	- lightning-cli: simple lightning command line client.
+
+	Misc:
+	- configdir: support for ~/.lightning/config
+	- controlled_time: support for dev-mocktime to alter time.
+	- log: logging routines
+	- pseudorand: pseudorandom wrapper
+	- secrets: routines for using secret keys.
+	- timeout: timer support.
+
+	Dealing with bitcoin events:
+	- bitcoind: communication with bitcoind to monitor/send txs.
+	- watch: wrapper for watching specific events.
+
+	Core code:
+	- lightningd: main routine for lightning
+	- packets: per-peer packet creation and acceptance routines 
+	- peer: peer routines and data structure.
+
+Feel free to ask questions on the lightning-dev mailing list, or on
+#lightning-dev on IRC, or email me at rusty@rustcorp.com.au.
+
+Cheers!
+Rusty.

Makefile

@@ -1,5 +1,5 @@
 #! /usr/bin/make
-NAME=MtGox's Cold Wallet
+NAME=Butterfly Labs' Timely Delivery
 
 # Needs to have oneof support: Ubuntu vivid's is too old :(
 PROTOCC:=protoc-c