Some more spindash changes. NOTE that this temporarily breaks the charging...

Some more spindash changes. NOTE that this temporarily breaks the charging aura; if we want to, we can either kill that entirely or re-enable it - but none of the main characters are using it, and Lua makes having a dedicated charging aura irrelevant if the main characters don't use it...

* Spindash sound only plays six times during the charge, equally spaced up until you finish charging.
* Spindash animation speed increase rebalanced.