Merge pull request #1 from SuperSpaceEye/main

Improvements on internal logic.
Updated powder charge power
Projectiles now actually hit on ascension !
Some rearranging too.

Still has to be tested a bit, and I need to build the exe for that.
This is candidate for v1.2.0

Update README.md

Added relative precision text and second trajectoy text
+ Issue (imprecise shots on cannons with low power)

Delete old calculator file