NIDM-Results export

[cmaumet]

This pull requests implements export of SnPM results as NIDM-Results packs.

[nicholst]

Thank you!! Looking forward to discussing this next week.

[cmaumet]

Discussed with @nicholst: computation of Grand Mean Map: can be done as the mean of all inputs around https://github.com/nicholst/SnPM-devel/blob/master/snpm_cp.m#L620-L624, cf. https://github.com/nicholst/SnPM-devel/tree/WriteGrandMean.

[cmaumet]

  1×70 TestResult array with properties:

    Name
    Passed
    Failed
    Incomplete
    Duration
    Details

Totals:
   70 Passed, 0 Failed, 0 Incomplete.
   438.6952 seconds testing time.

[cmaumet]

Next to do:

• Integrate NIDM export into the GUI (ask user for coordinate space and group info)

[cmaumet]

This is now ready to merge. We will wait until the Matlab NIDM-Results generic exporter is released as part of SPM (next release) so that we do not have to ship those files as part of SnPM as well.