Detected package data should be shown in string format for CSV output

Some of the "package declared license" from package scans returned as data structure instead of plain text in CSV output. For instance,
```
[OrderedDict([(u'type', u'BSD'), (u'url', u'http://github.com/spumko/boom/raw/master/LICENSE')])]
[OrderedDict([(u'type', u'MIT'), (u'url', u'https://github.com/bower/config/blob/master/LICENSE')])]
[OrderedDict([(u'type', u'MIT'), (u'url', u'https://github.com/bower/endpoint-parser/blob/master/LICENSE')])]
```

The above does not look good in the CSV.