Reorganize docs for easier deploys

With the current docs directory setup, I'm making too many mistakes and have to manually address path changes and directory moves on deploy. This makes for a frustrating experience developing locally and shipping releases. With this PR, we're basically back to the same setup from v3—duplicating the dist directory into our docs directory. Not the most ideal, but very straightforward for me as the release manager.

site/docs/4.1/examples/carousel/carousel.css

@@ -0,0 +1,91 @@
+/* GLOBAL STYLES
+-------------------------------------------------- */
+/* Padding below the footer and lighter body text */
+
+body {
+  padding-top: 3rem;
+  padding-bottom: 3rem;
+  color: #5a5a5a;
+}
+
+
+/* CUSTOMIZE THE CAROUSEL
+-------------------------------------------------- */
+
+/* Carousel base class */
+.carousel {
+  margin-bottom: 4rem;
+}
+/* Since positioning the image, we need to help out the caption */
+.carousel-caption {
+  bottom: 3rem;
+  z-index: 10;
+}
+
+/* Declare heights because of positioning of img element */
+.carousel-item {
+  height: 32rem;
+  background-color: #777;
+}
+.carousel-item > img {
+  position: absolute;
+  top: 0;
+  left: 0;
+  min-width: 100%;
+  height: 32rem;
+}
+
+
+/* MARKETING CONTENT
+-------------------------------------------------- */
+
+/* Center align the text within the three columns below the carousel */
+.marketing .col-lg-4 {
+  margin-bottom: 1.5rem;
+  text-align: center;
+}
+.marketing h2 {
+  font-weight: 400;
+}
+.marketing .col-lg-4 p {
+  margin-right: .75rem;
+  margin-left: .75rem;
+}
+
+
+/* Featurettes
+------------------------- */
+
+.featurette-divider {
+  margin: 5rem 0; /* Space out the Bootstrap <hr> more */
+}
+
+/* Thin out the marketing headings */
+.featurette-heading {
+  font-weight: 300;
+  line-height: 1;
+  letter-spacing: -.05rem;
+}
+
+
+/* RESPONSIVE CSS
+-------------------------------------------------- */
+
+@media (min-width: 40em) {
+  /* Bump up size of carousel content */
+  .carousel-caption p {
+    margin-bottom: 1.25rem;
+    font-size: 1.25rem;
+    line-height: 1.4;
+  }
+
+  .featurette-heading {
+    font-size: 50px;
+  }
+}
+
+@media (min-width: 62em) {
+  .featurette-heading {
+    margin-top: 7rem;
+  }
+}