Add instructions to README

README.md

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-# smartdice
-Dice smart contract to run on the Ethereum Virtual Machine
+# SmartDice
+
+A die smart contract that runs on the Ethereum Virtual Machine. The die will roll a random number between 1 and 6, as determined by [WolframAlpha](https://www.wolframalpha.com) via [Oraclize](http://www.oraclize.it/).
+
+### Usage
+
+To roll, execute the `rollDice` function with enough Ether to cover the Oraclize fee. The result will be made available via the `diceRoll` event and stored in the public `lastRoll` variable as a `uint`. 
+
+### Deployment
+
+Compile using [Remix](https://ethereum.github.io/browser-solidity) and deploy to an Ethereum network of your choice using [Go Ethereum](https://geth.ethereum.org/) or [Parity](https://parity.io).