Add /wand combine command
Implement wand organization (double-click in wand inventory)
Re-organize wand categories, and add localizations.

Not using localization in-game, yet.
Fix wand organizing, and some click-handling fixes in general.
Fix wand organization
Make wand map markers non-persistant.

They seem to come back after I remove them :\
Some documentation updates.
Some wand fixes and tweaks, added 3 levels of each bending wand.
Take ownership of wands when combining.

Combining is also now additive, rather than creating a new wand and
adding both to it.
Mix wand colors when combining wands.
More flexibility for scripting fling

This is going to become common for all spells. But I have plans for
fling in the near-term.
Safe-retrieve null Doubles from a config node.
Fix missing names on new bending wands.
Match flare and boom effects to wand color.
Fix some message spacing.
Organize inventory on an anvil, not from double-click.
Use volume-based rendering triggers in dynmap for large constructions
Add IterateSpell, replace lava, add earth and stream.
Allow using material variants as spell icons.
Add "/magic search" and "/magic cancel" commands.