I'm trying to import a contract from GitHub:
pragma solidity ^0.4.18;
pragma experimental ABIEncoderV2;
pragma experimental "v0.5.0";
import "github.com/ethereum/dapp-bin/library/stringUtils.sol";
However, it says, Error: Could not find github.com/ethereum/dapp-bin/library/stringUtils.sol from any sources;
. What am I doing wrong?