Allow supplying only the name

Allow supplying only the name instead of the entire inquirer Question.
The question is then created with the name as `name`-property.

README.md

@@ -34,6 +34,11 @@ askName(
 ).then(function(answer) {
   console.log(answer.name);
 });
+
+// Equivalent to {name: 'name'}
+askName('name', inquirer).then(function(answer) {
+  console.log(answer.name);
+});
 ```
 
 Inside a **Yeoman Generator** you'd call it this way:
@@ -60,7 +65,8 @@ module.exports = generators.Base.extend({
 
 `askName` takes 2 parameters:
 
-1. `prompt` an [Inquirer prompt configuration](https://github.com/SBoudrias/Inquirer.js#question).
+1. `prompt` an [Inquirer prompt configuration](https://github.com/SBoudrias/Inquirer.js#question)
+   or just a string to serve as name.
 2. `inquirer` or any object with a `obj.prompt()` method.
 
 **Returns:** A `Promise` resolved with the answer object.

lib/index.js

@@ -14,11 +14,18 @@ var defaults = {
  * This function will use the given prompt config and will then check if the value is
  * available as a name on npm. If the name is already picked, we'll ask the user to
  * confirm or pick another name.
- * @param  {Object}   prompt   Inquirer prompt configuration
- * @param  {inquirer} inquirer Object with a `prompt` method. Usually `inquirer` or a
- *                             yeoman-generator.
+ * @param  {(Object|String)} prompt   Inquirer prompt configuration or the name to be
+ *                                    used in it.
+ * @param  {inquirer}        inquirer Object with a `prompt` method. Usually `inquirer`
+                                      or a yeoman-generator.
  */
 module.exports = function askName(prompt, inquirer) {
+  if (typeof prompt === 'string') {
+    prompt = {
+      name: prompt
+    };
+  }
+
   var prompts = [
     Object.assign({}, defaults, prompt, {
       validate: function (val) {