add ability to override default target
add ability to override default target

bjourne/factor,factor/factor,mrjbq7/factor,AlexIljin/factor,sarvex/factor-lang,sarvex/factor-lang,ceninan/factor,cataska/factor,mcandre/factor,slavapestov/factor,seckar/factor,sarvex/factor-lang,littledan/Factor,littledan/Factor,tgunr/factor,dharmatech/factor,seckar/factor,ehird/factor,factor/factor,mcandre/factor,mcandre/factor,ceninan/factor,AlexIljin/factor,ehird/factor,AlexIljin/factor,bpollack/factor,littledan/Factor,dch/factor,ehird/factor,slavapestov/factor,erg/factor,factor/factor,sarvex/factor-lang,tgunr/factor,nicolas-p/factor,erg/factor,erg/factor,mcandre/factor,nicolas-p/factor,erg/factor,dharmatech/factor,kingcons/factor,mcandre/factor,dch/factor,littledan/Factor,slavapestov/factor,bpollack/factor,factor/factor,bpollack/factor,nicolas-p/factor,factor/factor,sarvex/factor-lang,AlexIljin/factor,dch/factor,tgunr/factor,slavapestov/factor,mrjbq7/factor,mrjbq7/factor,Keyholder/factor,bjourne/factor,cataska/factor,ceninan/factor,mrjbq7/factor,tgunr/factor,kingcons/factor,bjourne/factor,Keyholder/factor,bpollack/factor,erg/factor,Keyholder/factor,mcandre/factor,dharmatech/factor,factor/factor,mrjbq7/factor,bpollack/factor,dch/factor,erg/factor,sarvex/factor-lang,bjourne/factor,jwmerrill/factor,bjourne/factor,bjourne/factor,mrjbq7/factor,nicolas-p/factor,AlexIljin/factor,slavapestov/factor,AlexIljin/factor,nicolas-p/factor,jwmerrill/factor,nicolas-p/factor,ceninan/factor,mcandre/factor,kingcons/factor,bpollack/factor,dch/factor,sarvex/factor-lang,AlexIljin/factor,slavapestov/factor,jwmerrill/factor,slavapestov/factor,seckar/factor,tgunr/factor,kingcons/factor,nicolas-p/factor,erg/factor,bpollack/factor,cataska/factor,cataska/factor,bjourne/factor,tgunr/factor,dch/factor