fix(text): The Potion that gives Health...

...is a Health Potion.
chore(i18n): update locales
fix(i18n): update broken code inside translations
chore(grunt): grunt
feat(mystery): 0 GP mystery items @deilann
fix #3513 - if contrib level is NaN, use 0

Fixes (I hope) https://github.com/HabitRPG/habitrpg/issues/3513. NOTE that private code will need to be edited too - ref https://github.com/HabitRPG/habitrpg-shared/commit/f49ed5436c60d6b135909a3c8714347d99499701
Merge pull request #221 from Alys/fix

fix #3513 - if contrib level is NaN, use 0
fix(accessories): add body accessory to user model, fixes https://github.com/HabitRPG/habitrpg/issues/3346
feat(mystery): add 05/2014 mystery item
chore(i18n): update locales
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