Shortcut to construct a tuple with default values

- Will help with migration to better buff/debuff representation, and
  mayhaps other groupings of related things within other namedtuples.
Changed representation of buffs and debuffs.

- Internally they are changed to dedicated tuples.
- Externally they data files have their own sections.
- So all buffs and debuffs in data are restructured.
- All values also default to 0.  So all existing data files have to
  include addition for a default shield_regen value to maintain the
  previous rulesets.  Lazy mode by just adding in 99999 for that.