Goodreads integration

[intari]

• login to Goodreads
• find matching books on user's shelves (or somehow else?)
• move to 'currently-reading' if user starts reading a book?
• update progress (how? ADE-pages are not liked by goodreads, %-style?)
• update status when book is finished?

[intari]

• Regular API https://www.goodreads.com/api
• they use OAuth1 with some tricks. documentation at https://www.goodreads.com/api/documentation#oauth
• API call to use https://www.goodreads.com/api#user_status.create
• Existing wrapper for Android (even with gradle support) https://github.com/MarcBernstein/android-goodreads-api