add a placeholder health bar
base projectile trajectory on player velocity rather than orientation
update projectile
Merge branch 'Feature/AddHealthBar'

* Feature/AddHealthBar:
  update projectile
  base projectile trajectory on player velocity rather than orientation
  add a placeholder health bar

Conflicts:
	Assets/Prefabs/Projectile_tests/testProjectile.prefab
	Assets/Scripts/testProjectile_Script.js
	Assets/main.unity