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

[chinyeungli]

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.