Prepare for 2.9.9
Enable cast messages by default.
Remove dtlTraders integration load delay. Still broken though.
Add "keep" and "bound" wand options, for wands that you keep on death and/or are bound to a specific player.
Allow setting a wand to bound (or keep, off by default) on an anvil.
Switch to spyc for YAML parsing in PHP, it can handle my (apparently wacky?) list-of-objects syntax (for effects)

This fixes the website, which has been showing an out of date config
for a while now.
Tweak a bunch of spell icons (mostly the ones that use flowers).
Update some website icons (flowers and saplings, mostly)- add data variants.
Update website and clean up some of the default wands.
Hide hidden wands from the /wands list.
Some wand color updates.
Fix tree name potential NPE.
Fix dtlTraders integration. Requires dtlTraders v3.1.0 (dev snapshot at time of this release)
Some spell fixes, specially to bridge which had a broken icon.
Re-arrange example files to be organized by plugin.
Remove the Mail spell from default configs.
Some specific fixes for dealing with NPCs.
Rename the nether and elder wand keys.