Typo fix: avaible -> available

contracts/token/StandardToken.sol

@@ -56,7 +56,7 @@ contract StandardToken is BasicToken, ERC20 {
    * @dev Function to check the amount of tokens that an owner allowed to a spender.
    * @param _owner address The address which owns the funds.
    * @param _spender address The address which will spend the funds.
-   * @return A uint256 specifing the amount of tokens still avaible for the spender.
+   * @return A uint256 specifing the amount of tokens still available for the spender.
    */
   function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
     return allowed[_owner][_spender];