Merge branch 'merge-subscribe-user' into 'mfc-develop'

src/App.scss

src/components/moderation_tools/moderation_tools.vue

src/components/progress_button/progress_button.vue

src/components/user_card/user_card.js

src/components/user_card/user_card.vue

src/components/user_profile/user_profile.js

src/i18n/en.json

src/modules/users.js

src/services/api/api.service.js

.../backend_interactor_service/backend_interactor_service.js

src/services/entity_normalizer/entity_normalizer.service.js

static/font/config.json

static/font/css/fontello-codes.css

static/font/css/fontello-embedded.css

static/font/css/fontello-ie7-codes.css

static/font/css/fontello-ie7.css

static/font/css/fontello.css

static/font/demo.html

static/font/font/fontello.eot

static/font/font/fontello.svg