MASCReader unable to read from classpath

Originally reported on Google Code with ID 63

```
The MASCReader assumes that the location it reads from is on the file system. This should
not be necessary. By sticking to URLs and streams, it should also be able to read from
ZIP files or from the classpath - like other subclasses of ResourceCollectionReaderBase
can do as well.
```

Reported by `richard.eckart` on 2014-11-27 15:37:11
