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/_sass/_buttons.scss

@@ -0,0 +1,153 @@
+/* ==========================================================================
+   BUTTONS
+   ========================================================================== */
+
+/*
+   Default button
+   ========================================================================== */
+
+.btn {
+  /* default button */
+  display: inline-block;
+  margin-bottom: 0.25em;
+  padding: 0.5em 1em;
+  color: #fff !important;
+  font-family: $sans-serif;
+  font-size: $type-size-6;
+  font-weight: bold;
+  text-align: center;
+  text-decoration: none;
+  background-color: $primary-color;
+  border: 0 !important;
+  border-radius: $border-radius;
+  cursor: pointer;
+
+  &:hover {
+    background-color: mix(white, #000, 20%);
+  }
+
+  .icon {
+    margin-right: 0.5em;
+  }
+
+  .icon + .hidden {
+    margin-left: -0.5em; /* override for hidden text*/
+  }
+
+  /* fills width of parent container */
+
+  &--block {
+    display: block;
+    width: 100%;
+
+    + .btn--block {
+      margin-top: 0.25em;
+    }
+  }
+
+  /* for dark backgrounds */
+
+  &--inverse {
+    color: $gray !important;
+    border: 1px solid $light-gray !important; /* override*/
+    background-color: #fff;
+
+    &:hover {
+      color: #fff !important;
+      border-color: $gray;
+    }
+  }
+
+  /* light outline */
+
+  &--light-outline {
+    border: 1px solid #fff !important; /* override*/
+    background-color: transparent;
+  }
+
+  /* information */
+
+  &--info {
+    background-color: $info-color;
+
+    &:hover {
+      background-color: mix(#000, $info-color, 20%);
+    }
+  }
+
+  /* warning */
+
+  &--warning {
+    background-color: $warning-color;
+
+    &:hover {
+      background-color: mix(#000, $warning-color, 20%);
+    }
+  }
+
+  /* success */
+
+  &--success {
+    background-color: $success-color;
+
+    &:hover {
+      background-color: mix(#000, $success-color, 20%);
+    }
+  }
+
+  /* danger */
+
+  &--danger {
+    background-color: $danger-color;
+
+    &:hover {
+      background-color: mix(#000, $danger-color, 20%);
+    }
+  }
+
+  /* disabled */
+
+  &--disabled {
+    pointer-events: none;
+    cursor: not-allowed;
+    filter: alpha(opacity=65);
+    box-shadow: none;
+    opacity: 0.65;
+  }
+
+  /* social buttons */
+
+  $social:
+  (facebook, $facebook-color),
+  (twitter, $twitter-color),
+  (google-plus, $google-plus-color),
+  (linkedin, $linkedin-color);
+
+  @each $socialnetwork, $color in $social {
+    &--#{$socialnetwork} {
+      background-color: $color;
+
+      &:hover {
+        background-color: mix(#000, $color, 20%);
+      }
+    }
+  }
+
+  /* extra large button */
+
+  &--x-large {
+    font-size: $type-size-4;
+  }
+
+  /* large button */
+
+  &--large {
+    font-size: $type-size-5;
+  }
+
+  /* small button */
+
+  &--small {
+    font-size: $type-size-7;
+  }
+}