Units

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