Added inactive icon and fixed build bug

In order to be more coherent with the last project (the Java built one), I've added the StatusItem behaviour, being more greyed when it's inactive, and black when it's uploading an image

I've also fixed a build bug:

```swift
for (index, element) in enumerate(query.results)
```
Gave a compilation error, as AnyObject didn't implement the Sequence protocol

```swift
for index in 0..<(query.results.count) {
     addToBlacklist(query.resultAtIndex(index).valueForKey(NSMetadataItemPathKey) as String)
}
```
does work