Clean up repo (#159)

* Clean up repo

* Move safe callback

README.md

@@ -6,26 +6,6 @@ Uniswap v4 is a new automated market maker protocol that provides extensibility
 
 If you’re interested in contributing please see the [contribution guidelines](https://github.com/Uniswap/v4-periphery/blob/main/CONTRIBUTING.md)!
 
-## Repository Structure
-
-```solidity
-contracts/
-----hooks/
-    ----examples/
-        | GeomeanOracle.sol
-        | LimitOrder.sol
-        | TWAMM.sol
-        | VolatilityOracle.sol
-----libraries/
-    | Oracle.sol
-BaseHook.sol
-test/
-```
-
-To showcase the power of hooks, this repository provides some interesting examples in the `/hooks/examples/` folder. Note that none of the contracts in this repository are fully production-ready, and the final design for some of the example hooks could look different.
-
-Eventually, some hooks that have been audited and are considered production-ready will be placed in the root `hooks` folder. Not all hooks will be safe or valuable to users. This repository will maintain a limited set of hook contracts. Even a well-designed and audited hook contract may not be accepted in this repo.
-
 ## Local Deployment and Usage
 
 To utilize the contracts and deploy to a local testnet, you can install the code in your repo with forge:
@@ -38,7 +18,7 @@ If you are building hooks, it may be useful to inherit from the `BaseHook` contr
 
 ```solidity
 
-import {BaseHook} from 'v4-periphery/contracts/BaseHook.sol';
+import {BaseHook} from 'v4-periphery/src/base/hooks/BaseHook.sol';
 
 contract CoolHook is BaseHook {
     // Override the hook callbacks you want on your hook