Add Zucchini Bars recipe

And suggested Cream Cheese Frosting recipe.  These recipes were included
as a letter in a 2016 CSA box from Plesant Lane Farm.

Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>

sauces/cream_cheese_frosting.tex

@@ -0,0 +1,23 @@
+%
+% Copyright 2016 (c) Anna Schumaker.
+%
+\documentclass{../recipe}
+
+\recipeName{Cream Cheese Frosting}
+\recipeMakes{1\quarter cup}{frosting}
+\recipeSourcePerson{Zucchini Bars}{Pleasant Lane Farm}
+
+\begin{document}
+\begin{ingredientsSmall}
+\addIngredient{4 ounces}{cream cheese, softened}
+\addIngredient{\half cup}{butter, softened}
+\addIngredient{2 cups}{powdered sugar}
+\addIngredient{1 teaspoon}{vanilla extract}
+\end{ingredientsSmall}
+
+\begin{steps}
+\addStep{Combine \ingredient{cream cheese}, \ingredient{butter},
+	 \ingredient{powdered sugar}, and \ingredient{vanilla} in a medium
+	 mixing bowl.  Mix until smooth.}
+\end{steps}
+\end{document}

snacks/zucchini_bars.tex

@@ -0,0 +1,37 @@
+%
+% Copyright 2016 (c) Anna Schumaker.
+%
+\documentclass{../recipe}
+
+\recipeName{Zucchini Bars}
+\recipeSourcePerson{Zucchini Bars}{Pleasant Lane Farm}
+
+\begin{document}
+\begin{ingredients}
+\addIngredient{2 cups}{flour}
+\addIngredient{3 teaspoons}{cinnamon}
+\addIngredient{3}{eggs}
+\addIngredient{1 cup}{white sugar}
+\addIngredient{1 cup}{brown sugar}
+\addIngredient{1 cup}{vegetable oil}
+\addIngredient{2 teaspoons}{baking soda}
+\addIngredient{1 teaspoon}{salt}
+\addIngredient{2 cups}{zucchini, shredded}
+\addIngredient{1\quarter cups}{cream cheese frosting}
+\end{ingredients}
+
+\begin{steps}
+\addStep{Preheat oven to \textbf{\ftemp{350}}.
+	 Grease a \textbf{13 x 9 -- inch} cookie sheet.}
+\addStep{Combine \ingredient{flour} and \ingredient{cinnamon}
+	 in a small mixing bowl.  Set aside.}
+\addStep{Slightly beat \ingredient{eggs} in a large mixing bowl.  Mix in
+	 \ingredient{sugars}, \ingredient{oil}, \ingredient{baking soda},
+	 and \ingredient{salt}.  Alternately add \ingredient{zucchini} and
+	 \ingredient{flour mixture}.  Mix well.}
+\addStep{Pour onto cookie sheet and bake at \textbf{\ftemp{350}} for
+	 \textbf{30 minutes}.  Let cool before adding \ingredient{frosting}.}
+\end{steps}
+
+\addSuggestion{Frosting}{Cream Cheese Frosting}
+\end{document}