Move gh-pages branch files into /docs and add test files

- Jekyll ignore `/docs` and `/test` folders when using from root
- Update Staticman config to point to correct branch and data file location
- Replace `{{ base_path }}` references with `absolute_url` filter
- Update documentation

docs/_recipes/peanut-butter-cookies.md

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+---
+title: "Peanut Butter Cookies"
+---
+
+A peanut butter cookie is a type of cookie that is distinguished for having peanut butter as a principal ingredient. The cookie generally originated in the United States, its development dating back to the 1910s.
+
+## Ingredients
+
+* 1 cup unsalted butter
+* 1 cup crunchy peanut butter
+* 1 cup white sugar
+* 1 cup packed brown sugar
+* 2 eggs 2 
+* 1/2 cups all-purpose flour 
+* 1 teaspoon baking powder
+* 1/2 teaspoon salt
+* 1 1/2 teaspoons baking soda
+
+## Directions
+
+1. Cream butter, peanut butter, and sugars together in a bowl; beat in eggs.
+2. In a separate bowl, sift flour, baking powder, baking soda, and salt; stir into butter mixture. Put dough in refrigerator for 1 hour.
+3. Roll dough into 1 inch balls and put on baking sheets. Flatten each ball with a fork, making a crisscross pattern. Bake in a preheated 375 degrees F oven for about 10 minutes or until cookies begin to brown.