added setup for day 2

day02/CHANGELOG.md

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+# Revision history for day02
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.

day02/app/Main.hs

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+module Main where
+
+main :: IO ()
+main = putStrLn "Hello, Haskell!"

day02/day02.cabal

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+cabal-version:      2.4
+name:               day02
+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:             Andrew Maier
+maintainer:         andrew@maier.name
+
+-- A copyright notice.
+-- copyright:
+-- category:
+extra-source-files: CHANGELOG.md
+
+executable day02
+    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
+                    , day02
+    hs-source-dirs:   app
+    default-language: Haskell2010
+
+library
+    build-depends:    base ^>=4.14.3.0
+    hs-source-dirs:   lib
+    exposed-modules:  Day02
+    default-language: Haskell2010
+

day02/lib/Day02.hs

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+module Day02 where
+