* Added optional monitoring service (allows YACB to work on Xiaomi's MIUI).
* Improved hidden number detection in "normal" mode.
* Added Polish translation thanks to Evo (@verahawk).
* Fixes and improvements.

0.5.4:

* Added support for numbers without international prefix (Android 5+ only).
* Thanks for translations to Allan Nordhøy (@kingu), Olexandr Nesterenko (@burunduk), Yannis T. (@azakosath).
* Fixes and improvements.
