Refactoring to reduce confusing terms

[gambon2010]

The goal of the pull request is to refactor the TrajectoryData class to reduce confusing terms so:
distance >> x
height >> y
look_distance >> distance
drop_adj >> drop_angle
windage_adj >> windage_angle

I've run the integrated unit tests and everything seems to pass, but feel free to check the code on your end as I might have missed something

[o-murphy]

wouldn't be merged yet, cause of broken API backwards compatibility, and also tests fully failed

[o-murphy]

@gambon2010 please run pytest locally to verify u're not broke the code

pytest ./tests

[gambon2010]

@gambon2010 please run pytest locally to verify u're not broke the code

pytest ./tests

Hi! I've run them locally and for whatever reason they work on my machine. I'll try to fix the issue in the next few days, haven't had time to dig into it.

[o-murphy]

@gambon2010 please run pytest locally to verify u're not broke the code

pytest ./tests

Hi! I've run them locally and for whatever reason they work on my machine. I'll try to fix the issue in the next few days, haven't had time to dig into it.

Also we can't refactor Trajectory Data now, because of its backward compatibility would be broken