Clarify dependency policy between Cabal, cabal-install
Clarify dependency policy between Cabal, cabal-install

rimmington/cabal,enolan/cabal,Heather/cabal,kosmikus/cabal,ian-ross/cabal,thomie/cabal,sopvop/cabal,x-y-z/cabal,mightybyte/cabal,seereason/cabal,anton-dessiatov/cabal,enolan/cabal,bennofs/cabal,Helkafen/cabal,themoritz/cabal,valderman/cabal,lukexi/cabal,x-y-z/cabal,valderman/cabal,Peaker/cabal,martinvlk/cabal,seereason/cabal,christiaanb/cabal,mmakowski/cabal,plumlife/cabal,Heather/cabal,ghc-android/cabal,christiaanb/cabal,gbaz/cabal,headprogrammingczar/cabal,lukexi/cabal,randen/cabal,sopvop/cabal,corngood/cabal,triplepointfive/cabal,triplepointfive/cabal,mmakowski/cabal,eric-stanley/cabal,thomie/cabal,themoritz/cabal,plow-technologies/cabal,kosmikus/cabal,themoritz/cabal,corngood/cabal,trskop/cabal,trskop/cabal,beni55/cabal,mydaum/cabal,plow-technologies/cabal,gridaphobe/cabal,kolmodin/cabal,plumlife/cabal,headprogrammingczar/cabal,rimmington/cabal,beni55/cabal,thoughtpolice/cabal,ian-ross/cabal,martinvlk/cabal,eric-stanley/cabal,fugyk/cabal,sopvop/cabal,edsko/cabal,gbaz/cabal,gridaphobe/cabal,Peaker/cabal,garetxe/cabal,garetxe/cabal,mightybyte/cabal,mydaum/cabal,edsko/cabal,thoughtpolice/cabal,ghc-android/cabal,Helkafen/cabal,bennofs/cabal,anton-dessiatov/cabal,fugyk/cabal,kolmodin/cabal,randen/cabal