Use null power instead of 0/1 power.

<Zhorken> I'd like to motion (again) that 0 and 1 power both be stored
    as null
<Zhorken> and — or * be displayed based on damage class
<Zhorken> which is what determines 0 vs 1 anyway, with the arbitrary
    who-fucking-cares exception of Me First
<eevee> the ayes have it
<Zhorken> awesome
<eevee> that's a good idea i don't remember its being motioned the
    first time
<Zhorken> I definitely remember arguing it when B/W released
Rerip move stats.

Notes:

- I left all the flags surskitty added alone (powder, bite, pulse,
  ballistics, and mental) because they don't seem to be in with the
  other move flags.  The only new flags are the Sky Battle one that I
  added, and a mystery one, which I didn't add —
  http://pastebin.com/K27Vk95J

- move_meta_* is a mess and I don't like it but X/Y seem to have all the
  same move meta as B/W did so I updated it for the time being

- I didn't update effect_id because I'd have to sort out all the new
  effects that I added manually and that sounds like a bigger endeavour
Add a better ordering to languages.

This is kind of arbitrary, but here's my reasoning:

- Japanese goes first, because it's the original language.
- ja-kanji and roomaji follow because obviously we don't want to split
  Japanese up.
- Korean and Chinese go next to keep Asian languages together.
- Then English, because it's the main language other than Japanese.
- Then French and German, because they translate their Pokémon names???
  idk it feels intuitive to me.  Plus I guess their IDs are next.
- Then Spanish and Italian, because they're the only official languages
  left.
- Czech goes last because it's unofficial.