Add remaining haskell book exercises

Haskell-book/24/LearnParsers/package.yaml

@@ -0,0 +1,24 @@
+name:                LearnParsers
+version:             0.1.0.0
+author:              "Eugen Wissner"
+maintainer:          "belka@caraus.de"
+copyright:           "2018 Eugen Wissner"
+
+dependencies:
+- base >= 4.7 && < 5
+- trifecta
+- parsers
+
+library:
+  source-dirs: src
+
+executables:
+  LearnParsers:
+    main:                Main.hs
+    source-dirs:         app
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - LearnParsers