websocket updates

A collection of websocket updates:

#### Websocket clients can now request files
- `client.file('path/to/file', callback)`
- data in the callback is of the form: 

``` javascript
{
  content: "<h1>ActionHero</h1>\nI am a flat file being served to you via the API from ./public/simple.html<br />",
  context: "response",
  error: null,
  length: 101,
  messageCount: 3,
  mime: "text/html"
}
```

### http actions 
- The "actionHeroClient" client-side library can now be used to make http actions when not connected as a websocket (and websocket clients will fall back to http actions when disconnected)

``` javascript
var client = new actionHeroClient();
client.action('cacheTest', {key: 'k', value: 'v'}, function(err, data){
   // do stuff
}); 
```

### client events
- The client has been modified to emit events (like on the server side)
- This replaces the `client.events` hash.  Do not use it any more.
- Logging has been removed from the client in favor of events
  - You can use `client.on('message')` to capture every message from the server

```javascript
client = new actionHeroClient;
  
client.on('connected',    function(){ console.log('connected!') })
client.on('disconnected', function(){ console.log('disconnected :(') })
    
client.on('message',      function(message){ console.log(message) })

client.on('alert',        function(message){ alert(message) }) 
client.on('api',          function(message){ alert(message) })

client.on('welcome',      function(message){ appendMessage(message); })
client.on('say',          function(message){ appendMessage(message); })
```

### Misc
- The javascript files have been renamed to `actionHeroClient.js`
  - `<script type="text/javascript" src="/public/javascript/actionHeroClient.js"></script>`
  - <script type="text/javascript" src="/public/javascript/actionHeroClient.min.js"></script>