Error running --setup

If there is no "design" in the "beer-samples" bucket called "beer", running `node beer.js --setup` fails with the following error:

```
$ node beer.js --setup

c:\git\5\beersample-node\beer_designs.js:37
if(! ('by_name' in ddoc['views']) ) {
^
TypeError: Cannot read property 'views' of null
at c:\git\5\beersample-node\beer_designs.js:37:36
at c:\git\5\beersample-node\node_modules\couchbase\lib\bucketmgr.js:131:14
at IncomingMessage. (c:\git\5\beersample-node\node_modules\couchb
ase\lib\bucketmgr.js:11:7)
at IncomingMessage.emit (events.js:117:20)
at _stream_readable.js:943:16
at process._tickCallback (node.js:419:13)
```

What's funny is that this condition (having no document found) appears to be handled when the code that follows creates the "brewery" view -- it checks for `err` and creates a breweries design object. But this check isn't done when creating the "beers" view.

The code should be fixed. However, my workaround was to go to the database administration console, and add a fake view called `fake` under a design named specifically `beer`. This results in
`node beer.js --setup` successfully running, and the application working when started.