Ardent release: working MVP for data collection usage

Using this release, you are able to:

• Deploy an Ardent instance on your own infrastructure;
• Use Ardent to import papers and collect information from them;
• Many features has already been implemented: Questions, Settings, Data collection and management, ...

However, this is still a beta: some bugs can subsist and it needs more work to be considered as v1-ready:

• Be able to analyse collected knowledge: #13
• Better documentation of the code, the tool and the installation instructions: #41
• Allow the creation of multiple studies in Ardent, to allow researchers using this tool for multiple architectures without having to deploy one instance to each of them: #47