Add getting started section on README

README.md

-# zep-solidity
+# zeppelin-solidity
 Secure Smart Contract library for the Solidity language
 
-Provides classes to help with easy implementation of common security patterns.
+Provides contracts to help with easy implementation of common security patterns. See [Onward with Ethereum Smart Contract Security](https://medium.com/bitcorps-blog/onward-with-ethereum-smart-contract-security-97a827e47702#.y3kvdetbz).
+
+## Getting started
+
+Zeppelin integrates with [Truffle](https://github.com/ConsenSys/truffle), an Ethereum development environment. Please [install Truffle](https://github.com/ConsenSys/truffle#install) and initialize your project with `truffle init`.
+```
+sudo npm install -g truffle
+mkdir myproject && cd myproject
+truffle init
+```
+
+To install the Zeppelin library, run:
+```
+npm i zeppelin-solidity
+```
+
+After that, you'll get all the library's contracts in the `contracts/zeppelin` folder. You can use the contracts in the library like so:
+
+```
+import "./zeppelin/Rejector.sol";
+
+contract MetaCoin is Rejector { 
+  ...
+}
+```
+
+## Contracts
+TODO