Update gym leader definitions. Remove host sentience/update sprites.

[FrostedGeulleisia]

Update the definitions in leaders.asm to assign each host, that replaces a gym leader, the gym leader music. Splits trainer classes when neccesary, etc. Currently tested and working up to badge 6. (the rest have to wait until Chaos decides on replacements).

Also updates the text/overworld sprites wherever possible, to be consistent.

Summary:

Add IsGymLeader definitions for Johto:

• [X] !12rtyhasz (Omega Ruby)

• [X] :::?89977r (Sword)

• [X] d76o6yttr? (Waning Moon)

• [X] aoooo (Heart Gold)

• [X] Paul (Brown)

• [X] ACCPPQ (Theta Emerald EX)

• [ ] ??? (Undecided)

• [ ] ??? (Undecided)

Add IsGymLeader definitions for Kanto:

• [ ] ??? (Undecided)

• [ ] ??? (Undecided)

• [ ] ??? (Undecided)

• [ ] ??? (Undecided)

• [ ] ??? (Undecided)

• [ ] ??? (Undecided)

• [ ] ??? (Undecided)

• [ ] ??? (Undecided)

Assign other music:

• [X] Rocket music for F48/Wes/Larry

• [ ] Rival music for all "Rival" battles

• [ ] Gym Leader or Champion music for all other hosts with their final teams (for Mt. Silver).

Text/Sprite changes include Burned Tower, Ecruteak Gym, Olivine Lighthouse, Olivine Gym, Olivine City. Also fixed the Olivine City host encounter script, hopefully. That part is untested. It builds, and that's what matters, right?

[FrostedGeulleisia]

Now that I think about it, due to a time crunch (and Chaos's plans to update trainers with new species/moves soon). I should better merge this now, before conflicts arise.