Merge branch 'develop' of https://gitlab.com/PPL2017csui/PPLA1 into Features/HomeDosen

# Conflicts:
#	assets/css/custom.css
#	assets/js/ProfilePage.jsx
#	assets/js/VacancyPage.jsx
#	assets/js/__test__/components/AdminVacancy-test.jsx
#	assets/js/__test__/components/VacancyList-test.jsx
#	assets/js/components/AdminVacancy.jsx
#	assets/js/components/TopMenu.jsx
#	assets/js/index.jsx
#	core/lib/permissions.py
#	core/serializers/vacancies.py
#	core/tests/test_vacancies.py
#	core/views/vacancies.py