OSX app

This creates a first class app package for osx,

users will be able to download the zip file and they will see something like this,

![screen shot 2014-12-02 at 7 32 53 pm](https://cloud.githubusercontent.com/assets/412280/5275494/026cb47c-7a5a-11e4-92ec-121e06e58e89.png)


which they can drag to their application folder.

double clicking the app will make sure they have mono 3.10 installed. if they don't they get a dialog asking them to download it, giving them the option to be taken to the download page

![image](https://cloud.githubusercontent.com/assets/412280/5275509/4ed1278a-7a5a-11e4-807c-686733185f3f.png)

if they have mono 3.10 installed the app will start in the background


Todo:
- right now, the browser doesn't launch since sonarr thinks it's running in non-interactive mode
- it would be nice if we could add a toolbar icon, similar to the windows tray icon that would let you launch or kill sonar.