Make Accessor formatting differently than method formatting possible.

Currently method and accessor formatting is the same. 
However there are many styles (mono/sharpdevelop) where these are different

```
public int Foo {
   get {
       return foo;
   }
}

public int Bar()
{
   return bar;
}
```

should be possible. 

I suggest adding a NewLinesForBracesInAccessors option to handle all the accessor cases.
