Introduce an 'initialize()' function that does the actual init
(session, cookies, config options) and can called separately from
the constructor __init__().
This allows, for example, to adjust config access inside a Job
before most of it already happened when calling 'extractor.find()'.
- extract more metadata
- match "/show/" URLs
- complete test results
- fix missing images for lines starting with " <img"
- fix missing comma in supportedsites.py
