Shuffle things around and create a demo

FeedMonad-demo/CHANGELOG.md

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+# Revision history for FeedMonad-demo
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.

FeedMonad-demo/FeedMonad-demo.cabal

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+cabal-version:      2.4
+name:               FeedMonad-demo
+version:            0.1.0.0
+
+-- A short (one-line) description of the package.
+-- synopsis:
+
+-- A longer description of the package.
+-- description:
+
+-- A URL where users can report bugs.
+-- bug-reports:
+
+-- The license under which the package is released.
+-- license:
+author:             Mats Rauhala
+maintainer:         mats.rauhala@iki.fi
+
+-- A copyright notice.
+-- copyright:
+-- category:
+extra-source-files: CHANGELOG.md
+
+executable FeedMonad-demo
+    main-is:          Main.hs
+
+    -- Modules included in this executable, other than Main.
+    -- other-modules:
+
+    -- LANGUAGE extensions used by modules in this package.
+    -- other-extensions:
+    build-depends:
+        base ^>=4.14.3.0,
+        FeedMonad,
+        containers
+
+    hs-source-dirs:   app
+    default-language: Haskell2010

FeedMonad-demo/app/Main.hs

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+{-# LANGUAGE OverloadedStrings #-}
+module Main where
+
+import FeedMonad
+import Data.Category
+
+main :: IO ()
+main = do
+  defaultMain defaultConfig{feeds = [ Category "News" [] ]}

FeedMonad-demo/default.nix

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+{ mkDerivation, base, FeedMonad, lib }:
+mkDerivation {
+  pname = "FeedMonad-demo";
+  version = "0.1.0.0";
+  src = ./.;
+  isLibrary = false;
+  isExecutable = true;
+  executableHaskellDepends = [ base FeedMonad ];
+  license = "unknown";
+  hydraPlatforms = lib.platforms.none;
+}

FeedMonad-demo/src/MyLib.hs

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+module MyLib (someFunc) where
+
+someFunc :: IO ()
+someFunc = putStrLn "someFunc"