Make `stack path` output independent of logging. (Issue #604)
Make `stack path` output independent of logging. (Issue #604)

E.g.

    $ (export STACK_YAML=stack.yaml && stack path --local-install-root)
    Getting project config file from STACK_YAML environment
    /home/conathan/Desktop/mirrored/stack-fix/stack.git/.stack-work/install/x86_64-linux/lts-2.17/7.8.4

    $ (export STACK_YAML=stack.yaml && stack --verbosity silent path --local-install-root)
    /home/conathan/Desktop/mirrored/stack-fix/stack.git/.stack-work/install/x86_64-linux/lts-2.17/7.8.4

but I still think it's a good idea to also send log messages to stderr.

juhp/stack,AndreasPK/stack,soenkehahn/stack,mrkkrp/stack,lukexi/stack,luigy/stack,deech/stack,joozek78/stack,agrafix/stack,DanielG/stack,anton-dessiatov/stack,chreekat/stack,rvion/stack,rekka/stack,DanielG/stack,akhileshs/stack,lukexi/stack,rubik/stack,MichielDerhaeg/stack,robstewart57/stack,meiersi-11ce/stack,athanclark/stack,fizruk/stack,sjakobi/stack,ant1441/stack,mrkkrp/stack,tedkornish/stack,phadej/stack,Heather/stack,kairuku/stack,cabrera/stack,Fuuzetsu/stack,sjakobi/stack,markus1189/stack,bixuanzju/stack,luigy/stack,bixuanzju/stack,mathhun/stack,chreekat/stack,AndreasPK/stack,adinapoli/stack,Andrew-the-Ubergeek/stack,athanclark/stack,Andrew-the-Ubergeek/stack,cabrera/stack,MaxGabriel/stack,AndrewRademacher/stack,adinapoli/stack,keent/stack,achernyak/stack,rubik/stack,Denommus/stack,phadej/stack,duplode/stack,juhp/stack,bollu/stack,markus1189/stack,wolftune/stack,Blaisorblade/stack,supermario/stack,deech/stack,wolftune/stack,Denommus/stack,GaloisInc/stack,robstewart57/stack,MaxGabriel/stack,bollu/stack,agrafix/stack,harendra-kumar/stack,Heather/stack,meiersi-11ce/stack,chadbrewbaker/stack,tedkornish/stack,fizruk/stack,duplode/stack,narrative/stack,GaloisInc/stack,rekka/stack,keent/stack,wskplho/stack,narrative/stack,joozek78/stack,MichielDerhaeg/stack,ant1441/stack,vigoo/stack,achernyak/stack,vigoo/stack,supermario/stack,sinelaw/stack,kairuku/stack,anton-dessiatov/stack,harendra-kumar/stack,chadbrewbaker/stack,wskplho/stack,martin-kolinek/stack,akhileshs/stack,soenkehahn/stack,AndrewRademacher/stack,sinelaw/stack,rrnewton/stack,mathhun/stack,rvion/stack,martin-kolinek/stack,Fuuzetsu/stack,rrnewton/stack,Blaisorblade/stack