Many JP translations
Merge pull request #1817 from nafoster/develop

Many JP translations
One does not simply *pull request* into Heroism.

Improved descriptions of reward tiers in the Tavern chat sidebar. Also a handful of miscellaneous English syntax tweaks.
Merge pull request #1824 from HabitRPG/sabe_tweak

One does not simply *pull request* into Heroism.
send error to refresh page if they haven't since update
Shields don't come free ya know!

Fix a couple of missed pieces from reward tier text updates.
Merge pull request #1825 from HabitRPG/sabe_tweak_fix

Shields don't come free ya know!
groups: remove _v for now, it's causing issues (cast to Number failed
for Object) and I don't know why
challenges: include challenges that user created, or belongs to, even if
not in group anymore