Small refactoring of ConfigBase#{haveHg,branch,version}.
Small refactoring of ConfigBase#{haveHg,branch,version}.

--HG--
extra : rebase_source : 3507cd5053d8041826855822a399e882a946ae33

Kjwon15/dactyl,5digits/dactyl,Kjwon15/dactyl,moonshadow/dactyl,Kjwon15/dactyl,moonshadow/dactyl,5digits/dactyl,airodactyl/dactyl,5digits/dactyl,5digits/dactyl,madand/pentadactyl-pm,madand/pentadactyl-pm,5digits/dactyl,nathyong/dactyl,invl/dactyl,5digits/dactyl,nathyong/dactyl,invl/dactyl,moonshadow/dactyl,airodactyl/dactyl,moonshadow/dactyl,invl/dactyl,moonshadow/dactyl,Kjwon15/dactyl,madand/pentadactyl-pm,invl/dactyl,airodactyl/dactyl,moonshadow/dactyl,invl/dactyl,invl/dactyl,airodactyl/dactyl,nathyong/dactyl,nathyong/dactyl,airodactyl/dactyl,madand/pentadactyl-pm,Kjwon15/dactyl,airodactyl/dactyl,Kjwon15/dactyl,nathyong/dactyl,madand/pentadactyl-pm,madand/pentadactyl-pm,nathyong/dactyl