Currency conversions are (finally) here!

* Support for in-app donations
* Alternative spelling for American English
* Revamped settings UI with Android O style
* Fixed some translation typos
* Small bug fixes and improvements
* Choosing shortcuts moved to settings
* Keyboard now has a done button to dismiss it
* Flow: cubic metre per hour
* Viscosity: 4 units including pascal second and poise
* Medical conversions: 60+ units for glucose, cholesterol and more