Merge pull request #2052 from fulldecent/patch-4

Include a diversity of sources for GitHub imports

src/app/ui/landing-page/landing-page.js

@@ -222,7 +222,7 @@ export class LandingPage extends BaseApi {
             <p class="mb-1">Import From:</p>
             <div class="btn-group">
               <button class="btn btn-sm btn-secondary" onclick=${() => { importFromGist() }}>Gist</button>
-              <button class="btn btn-sm btn-secondary" onclick=${() => { load('Github', 'github URL', ['https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/crowdsale/Crowdsale.sol', 'https://github.com/OpenZeppelin/openzeppelin-solidity/blob/67bca857eedf99bf44a4b6a0fc5b5ed553135316/contracts/access/Roles.sol', 'github:OpenZeppelin/openzeppelin-solidity/contracts/ownership/Ownable.sol#v2.1.2']) }}>Github</button>
+              <button class="btn btn-sm btn-secondary" onclick=${() => { load('Github', 'github URL', ['https://github.com/0xcert/ethereum-erc721/src/contracts/tokens/nf-token-metadata.sol', 'https://github.com/OpenZeppelin/openzeppelin-solidity/blob/67bca857eedf99bf44a4b6a0fc5b5ed553135316/contracts/access/Roles.sol', 'github:OpenZeppelin/openzeppelin-solidity/contracts/ownership/Ownable.sol#v2.1.2']) }}>GitHub</button>
               <button class="btn btn-sm btn-secondary" onclick=${() => { load('Swarm', 'bzz-raw URL', ['bzz-raw://<swarm-hash>']) }}>Swarm</button>
               <button class="btn btn-sm btn-secondary" onclick=${() => { load('Ipfs', 'ipfs URL', ['ipfs://<ipfs-hash>']) }}>Ipfs</button>
               <button class="btn btn-sm btn-secondary" onclick=${() => { load('Https', 'http/https raw content', ['https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/master/contracts/crowdsale/validation/IndividuallyCappedCrowdsale.sol']) }}>https</button>