#55 Parse String[] args commandline parameter

This is a first implementation. It reuses the _parseProperties_ implementation. The following things are possible

### Single boolean parameters

```scala
val conf = ConfigFactory.parseArray(Array("-debug"))
conf.getBoolean("debug") // true: boolean
```

### Multiple parameters

```scala
val conf = ConfigFactory.parseArray(Array("-foo", "bar", "-debug"))
conf.getString("foo") // bar: String
conf.getBoolean("debug") // true: boolean
```