add play audio feature
test Retrofit+Gson
change observables
add loading functionality to Activity
fixes on ArtworkListfragment
add refresh button to Artwork List
check if the user has internet before calling the api
remove unused function
persist Artworks
fix add artworks to the adapter
add more margin
make prepare async
add configuration option to grab real or fake data
use like api
load artworks from DB if API connection fails
forgot oncomplete
move media player to a service
desperate catching exception. stop should make sure this doesn't get execute without the media player being prepared. Still this error happens and I don't know why...
some fixes on audio service
save audio status across rotations