VM error: revert.
    revert	The transaction has been reverted to the initial state.
    Note: The constructor should be payable if you send value.	Debug the transaction to get 
    more information.

pragma solidity ^0.4.0;

library IntExtended {
    
    function increment(uint _self) public pure returns (uint) {
        return _self+1;
    }
    
    function decrement(uint _self) public pure returns (uint) {
        return _self-1;
    }
    
    function incrementByValue(uint _self, uint _value) public pure returns (uint) {
        return _self + _value;
    }
    
    function decrementByValue(uint _self, uint _value) public pure returns (uint) {
        return _self - _value;
    }
}

pragma solidity ^0.4.0;

import "browser/library.sol";

contract TestLibrary {
    using IntExtended for uint;
    
    function testIncrement(uint _base) public pure returns (uint) {
        return IntExtended.increment(_base);
    }
    
    function testDecrement(uint _base) public pure returns (uint) {
        return IntExtended.decrement(_base);
    }
    
    function testIncrementByValue(uint _base, uint _value) public pure returns (uint) {
        return _base.incrementByValue(_value);
    }
    
    function testDecrementByValue(uint _base, uint _value) public pure returns (uint) {
        return _base.decrementByValue(_value);
    }
}

`function approve(address _spender, uint _value) public returns (bool success) {
   
    if (_value > 0 && __balanceOf[msg.sender] >= _value) {
    __allowances[msg.sender][_spender] = _value;
    return true;
    }
    return false;
}`

function getName() public view returns (string) {
        return name;
    }

function getAge() public view returns (uint) {
        return age;
    }