Update steem path in examples

examples/get-post-content.js

-const steem = require('..');
+const steem = require('../lib');
+
 const resultP = steem.api.getContentAsync('yamadapc', 'test-1-2-3-4-5-6-7-9');
 resultP.then(result => console.log(result));

examples/server.js

-var steem = require('./../index');
+var steem = require('../lib');
 
 steem.api.getAccountCount(function(err, result) {
 	console.log(err, result);
@@ -32,4 +32,4 @@ steem.api.getDiscussionsByActive({
   start_permlink: 'this-week-in-level-design-1-22-2017'
 }, function(err, result) {
 	console.log(err, result);
-});
\ No newline at end of file
+});

examples/test-vote.js

-const steem = require('..');
+const steem = require('../lib');
 
 const username = process.env.STEEM_USERNAME;
 const password = process.env.STEEM_PASSWORD;