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

test/_recipes/chocolate-chip-cookies.md

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+---
+title: "Chocolate Chip Cookies"
+---
+
+A chocolate chip cookie is a drop cookie that originated in the United States and features chocolate chips as its distinguishing ingredient.
+
+The traditional recipe combines a dough composed of butter and both brown and white sugar with semi-sweet chocolate chips. Variations include recipes with other types of chocolate as well as additional ingredients such as nuts or oatmeal.
+
+This recipe makes 4 dozen cookies.
+
+## Ingredients
+
+* 2 1/4 cups all-purpose flour
+* 1 teaspoon baking soda
+* 1/2 teaspoon salt
+* 1 cup butter, softened and cut to pieces
+* 1 cup sugar
+* 1 cup light brown sugar, packed
+* 2 teaspoons vanilla extract
+* 2 large eggs
+* 2 cups semi-sweet chocolate chips
+* 1/2 teaspoon nutmeg (optional)
+* 1 cup chopped pecans or walnuts (optional)
+
+## Directions
+
+1. Preheat the oven to 350 F.
+2. In a medium bowl, whisk flour with baking soda, nutmeg and salt.
+3. In a large bowl, beat butter with sugar and brown sugar until creamy and light. Add vanilla and eggs, one at a time, and mix until incorporated.
+4. Gradually add dry mixture into the butter-sugar wet blend, mixing with a spatula until combined. Add chocolate chips and nuts until just mixed.
+5. Drop tablespoon-sized clumps onto un-greased cookie sheets. Bake for 8-12 minutes, or until pale brown. Allow to cool on the pan for a minute or three, then transfer cookies to a wire rack to finish cooling.