Add orchestrator link and security contact (#157)

Author: brandoniles

README.md

@@ -9,6 +9,7 @@ This repository is a collection of [smart contracts](http://ampleforth.org/docs)
 The official contract addresses are:
 - ERC-20 Token: [0xD46bA6D942050d489DBd938a2C909A5d5039A161](https://etherscan.io/token/0xd46ba6d942050d489dbd938a2c909a5d5039a161)
 - Supply Policy: [0x1B228a749077b8e307C5856cE62Ef35d96Dca2ea](https://etherscan.io/address/0x1b228a749077b8e307c5856ce62ef35d96dca2ea#contracts)
+- Orchestrator: [0x6fb00a180781e75f87e2b690af0196baa77c7e7c](https://etherscan.io/address/0x6fb00a180781e75f87e2b690af0196baa77c7e7c)
 - Market Oracle: [0x99c9775e076fdf99388c029550155032ba2d8914](https://etherscan.io/address/0x99c9775e076fdf99388c029550155032ba2d8914)
 - CPI Oracle: [0xa759f960dd59a1ad32c995ecabe802a0c35f244f](https://etherscan.io/address/0xa759f960dd59a1ad32c995ecabe802a0c35f244f)
 
@@ -45,7 +46,8 @@ npx truffle --network ganacheUnitTest test test/unit/uFragments.js
 
 ## Contribute
 
-To report bugs within this package, please create an issue in this repository.
+To report bugs within this package, create an issue in this repository.
+For security issues, please contact [email protected].
 When submitting code ensure that it is free of lint errors and has 100% test coverage.
 
 ``` bash