#229: Fix bugs
- Change url ``/adega/admin`` to ``/admin`` - Fix bug when downloading .zip files with utf-8 when nginx container is enabled - Remove hardcoded ``csv_data_file.csv`` from json_to_csv module - Rename ``makefile`` to ``Makefile``
- Change url ``/adega/admin`` to ``/admin`` - Fix bug when downloading .zip files with utf-8 when nginx container is enabled - Remove hardcoded ``csv_data_file.csv`` from json_to_csv module - Rename ``makefile`` to ``Makefile``