[Translations] Add Serbian
fix big potential refresh bug
fix bloked fullscreen mode in entry list activity
Merge pull request #159 from pejakm/srtr

[Translations] Add Serbian
add pejakm name into the credits
fix layout error
add Mladen Pejaković name into the credits
change FeedEx name into Flym (no conflict with anything else)
change FeedEx name into Flym (no conflict with anything else)
Update README.md
fix compil errors
Merge remote-tracking branch 'origin/master'
change FeedEx name into Flym (no conflict with anything else)
v1.6.3