Change package versions to conform to nixpkgs conventions.
pygame: update to 1.9.1

Enable PNG and JPEG support
Use pygame-v4l patch from AUR
add Ren'Py 6.15.5

Ren'Py is a visual novel engine that helps you use words,
images, and sounds to tell stories with the computer.
This is just the minimal launcher.
haskell-accelerate-cuda: update to version 0.13.0.2
haskell-accelerate: update to version 0.13.0.2
haskell-classy-prelude: update to version 0.5.8
haskell-fingertree: update to version 0.1.0.0
haskell-monadcryptorandom: update to version 0.5.2
haskell-pipes-concurrency: update to version 1.2.0
haskell-postgresql-simple: update to version 0.3.3.1
haskell-yesod-core: update to version 1.2.2
haskell-yesod-persistent: update to version 1.2.1
haskell-yesod-platform: update to version 1.2.1
haskell-yesod-routes: update to version 1.2.0.1
haskell-yesod: update to version 1.2.1
haskell-hlint: update to version 1.8.46
Merge pull request #604 from iyzsong/renpy

Add Ren'Py visual novel engine
all-packages.nix: fix typo in path to 'renpy' expression
Add rmlint, a tool for removing duplicate files
rmlint: Remove unneeded dependency