Merge pull request #52 from trivago/dependencies_update

Dependencies update

Merge pull request #49 from trivago/couple_fixes

Couple fixes

Merge pull request #46 from wching/master

Migration to RxJava 2

Update gradle

Merge pull request #45 from trivago/feature/make_it_android_independant

Feature/make it android independant

Merge pull request #44 from trivago/bugfix-accessToken

Bugfix access token

Merge pull request #42 from anilanar/patch-1

Fix typo in README

Merge pull request #41 from trivago/feature/really_fix_raice_conditions

Feature/really fix raice conditions

Merge pull request #40 from trivago/feature/BUG_race_conditions

Prevent refresh race conditions

Merge pull request #37 from rheinfabrik/feature/update_sample

Feature/update sample