add 165 to 721 (#972)

* make _tokenId indexed in Transfer and Approval events

via: https://github.com/ethereum/EIPs/pull/1124/files

* fix: make name() and symbol() external instead of public

* feat: implement ERC721's ERC165

* feat: erc165 tests

* fix: don't use chai-as-promised in direct await

* fix: reorganize to /introspection

* feat: abstract all erc165 tests to a behavior

* feat: disallow registering 0xffffffff

test/introspection/SupportsInterfaceWithLookup.test.js

@@ -0,0 +1,24 @@
+import shouldSupportInterfaces from './SupportsInterface.behavior';
+import assertRevert from '../helpers/assertRevert';
+
+const SupportsInterfaceWithLookup = artifacts.require('SupportsInterfaceWithLookupMock');
+
+require('chai')
+  .use(require('chai-as-promised'))
+  .should();
+
+contract('SupportsInterfaceWithLookup', function (accounts) {
+  before(async function () {
+    this.mock = await SupportsInterfaceWithLookup.new();
+  });
+
+  it('does not allow 0xffffffff', async function () {
+    await assertRevert(
+      this.mock.registerInterface(0xffffffff)
+    );
+  });
+
+  shouldSupportInterfaces([
+    'ERC165',
+  ]);
+});