Clinica v.0.6.0

Changed

• [PET*] Use trcinstead of acq for BIDS compliance
• [Converters] Remove supperfluous use of acq entity in filenames for BIDS compliance

Added

• [adni-to-bids] allow extraction of metadata from xml
• [CI] Initiate use of unit tests

Fixed

• [adni-to-bids] fix edge case for supporting nan session-ids