Request: more friendly CLI UX

```
❯ grunt init
grunt-cli: The grunt command line interface. (v0.1.13)

Fatal error: Unable to find local grunt.

If you're seeing this message, either a Gruntfile wasn't found or grunt
hasn't been installed locally to your project. For more information about
installing and configuring grunt, please see the Getting Started guide:

http://gruntjs.com/getting-started
```

Shouldn't this just generate a Gruntfile for the user?
The same error is displayed with `grunt help` and `grunt --help`.

I understand that at some point, this functionality was [removed from Grunt](https://github.com/gruntjs/grunt-init-gruntfile), but I cannot figure out why. The [links are broken](https://github.com/gruntjs/grunt-docs/issues/44) in the current docs.

It'd also be great if there was a CLI UI like Bower or Yeoman.

```
❯ bower help init

Usage:
bower init []

Options:
-h, --help Show this help message
Additionally all global options listed in 'bower help' are available

Description:
Creates a bower.json file based on answers to questions.
```

```
❯ yo
[?] What would you like to do? (Use arrow keys)
❯ Run the Angular generator (0.7.1)
Run the Bootstrap3-less generator (3.0.1)
Run the Pure generator (0.2.0)
Run the Static generator (0.0.8)
Run the Webapp generator (0.4.7)
Run the Zurb-foundation generator (0.3.5)
Run the Karma generator (0.6.0)
(Move up and down to reveal more choices)
```

Even further,

```
❯ grunt-init
Running "init" task

A valid init template name must be specified.

Available templates

(No templates found)

Templates that exist in the /Users/kevinsuttle/.grunt-init directory may be run
with "grunt-init TEMPLATE". Templates that exist in another location may be run
with "grunt-init /path/to/TEMPLATE". A template is a directory that must
contain, at the very minimum, a template.js file.

For more information, see http://gruntjs.com/project-scaffolding
```

This is an opportunity to do work on the user's behalf, not give them a chore.