clean up cmd line usage description
clean up cmd line usage description

hpfem/cython,achernet/cython,da-woods/cython,encukou/cython,hhsprings/cython,c-blake/cython,mcanthony/cython,fperez/cython,larsmans/cython,ABcDexter/cython,mrGeen/cython,larsmans/cython,hpfem/cython,cython/cython,ABcDexter/cython,ChristopherHogan/cython,da-woods/cython,fperez/cython,achernet/cython,hickford/cython,acrispin/cython,andreasvc/cython,cython/cython,madjar/cython,ABcDexter/cython,roxyboy/cython,achernet/cython,acrispin/cython,madjar/cython,fperez/cython,acrispin/cython,marscher/cython,hhsprings/cython,fperez/cython,fabianrost84/cython,rguillebert/CythonCTypesBackend,fabianrost84/cython,cython/cython,bzzzz/cython,encukou/cython,fabianrost84/cython,slonik-az/cython,dahebolangkuan/cython,c-blake/cython,rguillebert/CythonCTypesBackend,mrGeen/cython,cython/cython,c-blake/cython,mrGeen/cython,dahebolangkuan/cython,c-blake/cython,marscher/cython,encukou/cython,madjar/cython,rguillebert/CythonCTypesBackend,mcanthony/cython,roxyboy/cython,mcanthony/cython,JelleZijlstra/cython,hickford/cython,andreasvc/cython,larsmans/cython,bzzzz/cython,hhsprings/cython,achernet/cython,slonik-az/cython,scoder/cython,andreasvc/cython,larsmans/cython,ChristopherHogan/cython,JelleZijlstra/cython,bzzzz/cython,JelleZijlstra/cython,marscher/cython,marscher/cython,hhsprings/cython,fabianrost84/cython,JelleZijlstra/cython,fperez/cython,da-woods/cython,hpfem/cython,encukou/cython,ABcDexter/cython,da-woods/cython,mrGeen/cython,scoder/cython,encukou/cython,c-blake/cython,madjar/cython,larsmans/cython,dahebolangkuan/cython,andreasvc/cython,hickford/cython,mcanthony/cython,hickford/cython,JelleZijlstra/cython,slonik-az/cython,scoder/cython,dahebolangkuan/cython,madjar/cython,marscher/cython,roxyboy/cython,roxyboy/cython,ChristopherHogan/cython,slonik-az/cython,mcanthony/cython,scoder/cython,hpfem/cython,ABcDexter/cython,acrispin/cython,acrispin/cython,dahebolangkuan/cython,hickford/cython,hhsprings/cython,achernet/cython,bzzzz/cython,hpfem/cython,roxyboy/cython,fabianrost84/cython,slonik-az/cython,mrGeen/cython,andreasvc/cython,rguillebert/CythonCTypesBackend