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/oatmeal-cookies.md

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+---
+title: "Oatmeal Cookies"
+---
+
+Oatmeal cookies are a proverbial favorite with both kids and adults. This crisp and chewy cookie is loaded with oats, dried fruit, and chopped nuts.
+
+## Ingredients
+
+* 1 cup butter, softened 1 cup white sugar
+* 1 cup packed brown sugar
+* 2 eggs
+* 1 teaspoon vanilla extract
+* 2 cups all-purpose flour
+* 1 teaspoon baking soda
+* 1 teaspoon salt
+* 1 1/2 teaspoons ground cinnamon
+* 3 cups quick cooking oats
+
+## Directions
+
+1. In a medium bowl, cream together butter, white sugar, and brown sugar. Beat in eggs one at a time, then stir in vanilla. Combine flour, baking soda, salt, and cinnamon; stir into the creamed mixture. Mix in oats. Cover, and chill dough for at least one hour.
+2. Preheat the oven to 375 degrees F (190 degrees C). Grease cookie sheets. Roll the dough into walnut sized balls, and place 2 inches apart on cookie sheets. Flatten each cookie with a large fork dipped in sugar.
+3. Bake for 8 to 10 minutes in preheated oven. Allow cookies to cool on baking sheet for 5 minutes before transferring to a wire rack to cool completely.