use -no-user-package-conf when compiling xmonad.hs; no longer show README; cabal2spec-0.23.2
- ignore user configured packages when recompiling user xmonad.hs
to avoid linking errors (#713035)
- don't display README.fedora initially on startup anymore
- drop the ghc-xmonad requires from xmonad-core
- update to cabal2spec-0.23.2