Implement sequence matching in extra/match.
Implement sequence matching in extra/match.

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