Added test vestibular chair data conversion + prep

Added startup mathlab script (radboud location)

startup.m

+addpath(genpath('U:\Documents\BIOLOGIE\STAGE'));
+init_biofysica
\ No newline at end of file

test.m

+D = pb_convertdata('block_info_JJH-0007-21-04-15-0001.mat')
+save('U:\Documents\BIOLOGIE\STAGE\MATLAB\Converted Data\converted_data_JJH-0007-21-04-15-0001.mat','D')
+pb_vPrepData