Calling browser close in managedcefbrowseradapter destructor

I've included two small superficial changes.

   - Small formatting changes ```8b6248b```
   - The other half of the cookies datetime granularity in the visit api ```cae957a```

```39742b6```
We have a case where we close the browser core before ```OnApplicationExit``` and need to manage the resources better. Calling ```Close()``` in the destructor to ensure the client adapter calls ```->CloseBroswer``` when disposed in ```webvide.cs```.