add: summary level database descriptor
add: summary level project descriptor
add: version level descriptor
add: distribution level component descriptor
add: distribution level aggregate descriptor
rm: generic descriptor
add: experiment project level
add: experiment study question level
add: experiment mr study level
add: experiment acquisition level
fix: /path/to replaced by relative path
fix: MaskMap was missing
update mask_map_ids to fit with what is exported in SPM (useful for test only)
Merge pull request #159 from cmaumet/fixSPMexampleGroundTruth

Fix: SPM ground truth
remove stat image properties entity and move attributes to searchSpace
fix: missing comma
Update domain: StatisticImageProperties -> SearchSpace
fix: remove link to header
fix: remove originalFileName
fix: inference used mask