Implement Fetcher#analyze only posts not yet photos
Use symbol for last_fetch_id
Implement Fetcher#analyze photos
Extract create_posts_list, create_photos_list
Add basic spec for checking types of object
Merge branch 'create_posts_list' into fetcher#analyze
Tumblefetch::Photo.new and add to photos
Merge pull request #6 from senosa/fetcher#analyze

Fetcher#analyze