CHANGELOG: add 3.0.0 changelog

Author: dcousens

CHANGELOG.md

@@ -1,3 +1,29 @@
+# 3.0.0
+From this release users can expect out-of-the-box Segregated Witness support.
+The majority of breaking changes have been in how `script` encoding/decoding occurs,  with the introduction of witness stacks.
+
+__added__
+- Added `script.types` enums (#679)
+- Added `script.*.*.{check,encode,decode[,encodeStack,decodeStack]}` functions (#681, #682)
+- Added minimal `TransactionBuilder.prototype.build` absurd fee-safety (#696)
+- Added `script.(decompile/compile)PushOnly` and `script.toStack` functions (#700)
+- Added `Transaction.prototype.toBuffer` Segregated Witness serialization support (#684, #701)
+- Added `Transaction.prototype.hasWitnesses` (#718)
+- Added `script.witnessCommitment.*` template
+
+__fixed__
+- Fixed `script` must compile minimally (#638)
+- Fixed `Transaction` and `Block` versions should be Int32, signed integers (#662)
+
+__removed__
+- Removed `ecdsa.calcPubKeyRecoveryParam`, `ecdsa.recoverPubKey` (#456)
+- Removed `buffer-equals`/`buffer-compare` dependencies (#650)
+- Removed `HDNode.prototype.toString` (#665)
+- Removed `dogecoin` network (#675)
+
+__renamed__
+- Removed `script.*` functions in favour of `bitcoin.script.*.(input/output).(encode/decode/check)` style (#682)
+
 # 2.3.0
 __added__
 - Added `HDNode.prototype.isNeutered` (#536)