Add component.json so dust can be easily installed with component for the browser

Added a convenience 'full.js' for use when installing via component (http://github.com/component/component), eg:

```
component install linkedin/dustjs
```

Then in your component-compatible browser code:

```
var dust = require( 'dustjs-linkedin' );

dust.render( 'template', { foo: 'bar' }, function( error, output ) {
    console.log( output );
});
```

Want to be able to compile templates in the browser?:

```
var dust = require( 'dustjs-linkedin/lib/full' );

var compiled = dust.compileFn( templateAsString );
compiled( { foo: 'bar' }, function( error, output ) {
    console.log( output );
});
```