Rearrange all the docs to allow for a docs/major.minor/ setup

assets/scss/_callouts.scss

@@ -0,0 +1,40 @@
+//
+// Callouts
+//
+
+.bd-callout {
+  padding: 1.25rem;
+  margin-top: 1.25rem;
+  margin-bottom: 1.25rem;
+  border: 1px solid #eee;
+  border-left-width: .25rem;
+  border-radius: .25rem;
+}
+
+.bd-callout h4 {
+  margin-top: 0;
+  margin-bottom: .25rem;
+}
+
+.bd-callout p:last-child {
+  margin-bottom: 0;
+}
+
+.bd-callout code {
+  border-radius: .25rem;
+}
+
+.bd-callout + .bd-callout {
+  margin-top: -.25rem;
+}
+
+// Variations
+@mixin bs-callout-variant($color) {
+  border-left-color: $color;
+
+  h4 { color: $color; }
+}
+
+.bd-callout-info { @include bs-callout-variant($bd-info); }
+.bd-callout-warning { @include bs-callout-variant($bd-warning); }
+.bd-callout-danger { @include bs-callout-variant($bd-danger); }