Issue #148: Adding support for .properties files

[properties-parser](https://github.com/xavi-/node-properties-parser) doesn't seem to provide a very full featured API nor much documentation at all, it also does not support the kind of deep object creation specified.

For example:
```properties
thing1.thing2 = something
```

Becomes:
```json
{
  "thing1.thing2": "something"
}
```

Whereas [properties](https://github.com/gagle/node-properties) does make a nested object if you specify that you want it to use namespaces. And properly renders:
```json
{
  "thing1": {
    "thing2": "something"
  }
}
```
As a result, I opted to use [properties](https://github.com/gagle/node-properties) even though its a bit older.