Set floating flag correctly when placing unit
Missing argument
Fixes floating bug fix
method for determining origin voxel of actions

this method will be used by projectiles as well as the AI when making fire
point estimations, and offset the origins according to vanilla specifications
modify how throws are deviated using vanilla formula
refactor throwing validity estimations.
Merge pull request #752 from cfailde/stopflying

Set floating flag correctly when placing unit
fix arcing shots