explain version string in help message
explain version string in help message

sidward/bart,mjacob75/bart,mrirecon/bart,grlee77/bart,nckz/bart,sidward/bart,nckz/bart,grlee77/bart,sidward/bart,nckz/bart,Takishima/bart,grlee77/bart,mrirecon/bart,mjacob75/bart,nckz/bart,mrirecon/bart,Takishima/bart,nckz/bart,mjacob75/bart,mrirecon/bart,frankong/bart,sidward/bart,mjacob75/bart,frankong/bart,sdimoudi/bart,Takishima/bart,frankong/bart,sidward/bart,grlee77/bart,sdimoudi/bart,mrirecon/bart,Takishima/bart,frankong/bart,frankong/bart,mjacob75/bart,sdimoudi/bart,Takishima/bart,grlee77/bart,sdimoudi/bart,sdimoudi/bart