Gas blender toolkit

Useful and comprehensive toolkit for scuba gas blender.

- partial pressure blending of trimix, nitrox, heliox
- continuous blending of trimix, nitrox, heliox
- ideal and real gas model (van der Waals)
- costs calculation
- top off from storage and more

The program is an completely rewritten successor to DIR-Wetnotes Application. Optimized for better user experience on the larger devices such as Tablet or desktop.