show "unequipped" message instead of "equipped" when taking off gear
improve(donations): remove reference to developers

Should reduce confusion about where gems money is going, especially if a dev fundraiser will be started.
improve(settings): add warning to API page

https://github.com/HabitRPG/habitrpg/issues/3049
chore(i18n): update locales
chore(i18n): add strings and update locales
chore(i18n): update locales and add british english
feat(mystery): june gift box
Merge pull request #222 from Alys/equip-fix2

show "unequipped" message instead of "equipped" when taking off gear
fix(i18n): use strings
chore(i18n): update locales
fix(equipment): only markModified(gear) when equipping gear
feat(bosses): add Octohulu quest
Stop using abbreviated names of attributes in UI.
Merge pull request #225 from Gaelan/just_call_it_perception

Stop using abbreviated names of attributes in UI.
fix(typo): percepition to perception

Fixes https://github.com/HabitRPG/habitrpg/issues/3586
feat(backgrounds): add backgrounds feature
feat(backgrounds): group bgs into sets in content.coffee, for easier
"purchase set"
feat(backgrounds): i18n for backgrounds
chore(i18n): update locales
i18n(background): Backgrounds => "User Backgrounds" @lemoness