Fix warnings, add documentation and changes in response to some interface changes.
Fix warnings, add documentation and changes in response to some
interface changes.

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