Merge branch 'gamification' into 'Develop'

src/App.js

src/Components/AchievementDescriptionCard.js

src/Components/ItemCard.js

src/Components/ItemCardAction.js

src/Components/ItemCarousel.js

src/Components/LevelDescriptionCard.js

src/Components/MenuBar.js

src/Components/RequirementsDialog.js

src/Components/ShinyProgressBar.js

src/Components/StoreGuide.js

src/Components/TabPanels/TabPanelStatusEConquistas.js

src/Components/UserCardGamified.js

src/Pages/ItemStore.js

src/Pages/UserPage.js

src/img/gamification/gem.svg