Add ansi logo.

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

lib/commands/version.js

@@ -17,7 +17,15 @@ cmd.handler = function(argv) {
     return console.log(version);
   }
 
-  console.log('leetcode-cli', version);
+  var logo = [
+    ' _           _                  _      ',
+    '| |         | |                | |     ',
+    '| | ___  ___| |_  ___  ___   __| | ___ ',
+    '| |/ _ \\/ _ \\ __|/ __|/ _ \\ / _` |/ _ \\',
+    '| |  __/  __/ |_  (__| (_) | (_| |  __/',
+    '|_|\\___|\\___|\\__|\\___|\\___/ \\__,_|\\___|  CLI v' + version
+  ].join('\n');
+  console.log(logo);
 
   var h = require('../helper');
   console.log();