Typo fix. standart -> standard

contracts/token/StandardToken.sol

@@ -8,7 +8,7 @@ import './ERC20.sol';
 /**
  * @title Standard ERC20 token
  *
- * @dev Implemantation of the basic standart token.
+ * @dev Implemantation of the basic standard token.
  * @dev https://github.com/ethereum/EIPs/issues/20
  * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
  */