Quests: initial Bosses WIP - invite, accept, reject, etc
Quests: hurt boss via score method, refactor chat function, change all content.*.name to content.*.key for consistency
quests: add abort feature
bosses: no models, performance improvements
quests: add collection quests, incl. polar bear pt 2, and quest arks, and achievements
add missing-gems migration
rename user.party.tally => user.party.progress
bosses: pretty things up amongst the modals, etc. Move rewards to a
directive so we can share it. Add dialog on quest-completion using
user.party.quest.completed flag
bosses: misc small bugs
bosses: bailey
Merge branch 'bosses' into develop
bosses: habitrpg-shared#develop