refs #2584 - Added Case Study migration and multilanguage file handler
refs #2584 - Added multilingual support for file and cover image
refs #2584 - Added migration in install.sh & update.sh
refs #2584 - Added case studies tests
refs #2584 - fixes issues
Merge pull request #94 from eugenst/2584_case_studies

refs #2584 - Case studies migration and tests