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/_pages/splash-page.md

@@ -0,0 +1,65 @@
+---
+title: "Splash Page"
+layout: splash
+permalink: /splash-page/
+date: 2016-03-23T11:48:41-04:00
+header:
+  overlay_color: "#000"
+  overlay_filter: "0.5"
+  overlay_image: /assets/images/unsplash-image-1.jpg
+  cta_label: "Download"
+  cta_url: "https://github.com/mmistakes/minimal-mistakes/"
+  caption: "Photo credit: [**Unsplash**](https://unsplash.com)"
+excerpt: "Bacon ipsum dolor sit amet salami ham hock ham, hamburger corned beef short ribs kielbasa biltong t-bone drumstick tri-tip tail sirloin pork chop."
+intro: 
+  - excerpt: 'Nullam suscipit et nam, tellus velit pellentesque at malesuada, enim eaque. Quis nulla, netus tempor in diam gravida tincidunt, *proin faucibus* voluptate felis id sollicitudin. Centered with `type="center"`'
+feature_row:
+  - image_path: assets/images/unsplash-gallery-image-1-th.jpg
+    alt: "placeholder image 1"
+    title: "Placeholder 1"
+    excerpt: "This is some sample content that goes here with **Markdown** formatting."
+  - image_path: /assets/images/unsplash-gallery-image-2-th.jpg
+    alt: "placeholder image 2"
+    title: "Placeholder 2"
+    excerpt: "This is some sample content that goes here with **Markdown** formatting."
+    url: "#test-link"
+    btn_label: "Read More"
+    btn_class: "btn--inverse"
+  - image_path: /assets/images/unsplash-gallery-image-3-th.jpg
+    title: "Placeholder 3"
+    excerpt: "This is some sample content that goes here with **Markdown** formatting."
+feature_row2:
+  - image_path: /assets/images/unsplash-gallery-image-2-th.jpg
+    alt: "placeholder image 2"
+    title: "Placeholder Image Left Aligned"
+    excerpt: 'This is some sample content that goes here with **Markdown** formatting. Left aligned with `type="left"`'
+    url: "#test-link"
+    btn_label: "Read More"
+    btn_class: "btn--inverse"
+feature_row3:
+  - image_path: /assets/images/unsplash-gallery-image-2-th.jpg
+    alt: "placeholder image 2"
+    title: "Placeholder Image Right Aligned"
+    excerpt: 'This is some sample content that goes here with **Markdown** formatting. Right aligned with `type="right"`'
+    url: "#test-link"
+    btn_label: "Read More"
+    btn_class: "btn--inverse"
+feature_row4:
+  - image_path: /assets/images/unsplash-gallery-image-2-th.jpg
+    alt: "placeholder image 2"
+    title: "Placeholder Image Center Aligned"
+    excerpt: 'This is some sample content that goes here with **Markdown** formatting. Centered with `type="center"`'
+    url: "#test-link"
+    btn_label: "Read More"
+    btn_class: "btn--inverse"
+---
+
+{% include feature_row id="intro" type="center" %}
+
+{% include feature_row %}
+
+{% include feature_row id="feature_row2" type="left" %}
+
+{% include feature_row id="feature_row3" type="right" %}
+
+{% include feature_row id="feature_row4" type="center" %}