changelog (#109)

* changelog

* typo

* docs point to a specific commit

CHANGELOG.md

@@ -0,0 +1,11 @@
+# v1.0.0
+
+First release of the Plasma MVP specification using ETH as the native currency. The contract allows for users to deposit funds which are assigned to a unique nonce.
+These deposits can subsequently be spent on the plasma chain that is run by the operator. The operator also must publish block headers and metadata to the contract.
+These committments can be batched into one call to save on gas fees. As in the original spec, this implementation relies on confim signatures to ensure trustlessness
+between the users and operator. The confirm signatures are embedded into the txBytes upon spends to ensure data availability and are published with each exited output
+with the exception of deposit exits. See [docs](https://github.com/FourthState/plasma-mvp-rootchain/blob/5f205fa5ca6e027843118412b155d46aad62fed1/docs/plasmaMVPFunctions.md) for a more detailed explanation of each function call. Our [research repository](https://github.com/fourthstate/plasma-research) has 
+information about many of the design decisions in this implementation.
+
+There are several improvements such as arbitrary ERC20 support that will be included in upcoming releases!
+