Clarify naming of positions and hooks

[DarthSharkie]

• pos -> drawPos
  • clearly indicate this is the drawing position
• ...Intercept -> do...
  • shifts to active voice to describe what the method does
  • This one didn't apply through the subclasses because they're private, but I will do the rest if the name change is agreeable.
• particle -> particleEffect
  • Given the prevalence of "particle" in this mod, it's worth clarifying this one.

Throughout, I think the constructor calls could chain together to set defaults, so I've given an example in ParticleObject that eliminates repetition. If this makes sense, I'll go through and apply this elsewhere.

[DarthSharkie]

I didn't upload my DebugParticleAnim1 class since it's a mess from testing. I figure we probably need to .gitignore that one...