feat(event): Winter NPCs
chore(grunt): grunt full

Also flips Ian NPC to standard spritesmith instead of animated GIF.
feat(event): Winter Wonderland 2015 gear
fix(event): head, not helm
feat(event): Wintery Hair Colors

Also removes an accidental duplication of a prior hair resource.
Merge pull request #400 from SabreCat/winter2015/npcs

Winter 2015 NPCs
Merge pull request #401 from SabreCat/winter2015/gear

Winter Wonderland 2015 Gear
Merge pull request #402 from SabreCat/winter2015/hair

Wintery Hair Colors for Wonderland 2015
chore(grunt): grunt full
feat(news): Promo images
chore(grunt): grunt full
Merge pull request #403 from SabreCat/Bailey

Promo art
chore(i18n): update locales
Fixed cron dayStart option.
Wrote test cases to verify fix.
Fixed test cases that were incorrect.
chore(grunt): compile