If no arguments are passed to embark, then display help by default

lib/cmd.js

@@ -16,6 +16,12 @@ Cmd.prototype.process = function(args) {
   this.test();
   this.upload();
   this.otherCommands();
+
+  //If no arguments are passed display help by default
+  if (!process.argv.slice(2).length) {
+    program.help();
+  }
+  
   program.parse(args);
 };