Moving adhd_fast_get functions to directory "common"
Changes to include "common" in the matlabpath
Fixing func name called and dim along which concat.
Adding a "subgroup" parameter to return selected subjects.
Added first script to load experiment defs to PROBID.
The adhd_fast_probid_exp_def script pass the check model test.
Probid doesntlike both n_scans_s and n_tasks > 1.
Moved adhd_fast_probid_exp_def.m to a design folder.
Moved utility functions to common. Renaming scripts.