Add new navbar, jumbotron, cards, and footer components.

static/assets/img/icons/icon-social-facebook.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="9" height="18" viewBox="0 0 9 18">
+  <path fill="#111" fill-rule="evenodd" d="M6,9.693 L8.334,9.693 L9,6.5775 L6,6.5775 L6,4.5 C5.8425,3.6195 6.09,2.9895 7.3335,3.1155 L9,3.1155 L9,0 C8.718,0.087 7.749,0 6.666,0 C4.2705,0 2.661,1.491 2.667,4.1535 L2.667,6.5775 L0,6.5775 L0,9.693 L2.667,9.693 L2.667,18 L6,18 L6,9.693 Z" opacity=".6"/>
+</svg>

static/assets/img/icons/icon-social-twitter.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="20" height="16" viewBox="0 0 20 16">
+  <path fill="#111" d="M19.426,1.894 C18.712,2.214 17.943,2.431 17.137,2.53 C17.96,2.03 18.592,1.239 18.889,0.295 C18.12,0.758 17.266,1.095 16.359,1.275 C15.632,0.491 14.595,0 13.449,0 C11.248,0 9.463,1.808 9.463,4.039 C9.463,4.355 9.497,4.664 9.566,4.96 C6.251,4.791 3.317,3.183 1.351,0.739 C1.008,1.336 0.81,2.031 0.81,2.77 C0.81,4.171 1.515,5.408 2.585,6.13 C1.931,6.111 1.317,5.929 0.779,5.627 L0.779,5.678 C0.779,7.634 2.153,9.266 3.977,9.638 C3.643,9.729 3.291,9.779 2.928,9.779 C2.671,9.779 2.422,9.754 2.178,9.707 C2.685,11.312 4.155,12.48 5.902,12.513 C4.537,13.595 2.818,14.239 0.951,14.239 C0.629,14.239 0.311,14.222 0,14.184 C1.761,15.331 3.857,16 6.109,16 C13.44,16 17.449,9.845 17.449,4.507 C17.449,4.333 17.446,4.158 17.438,3.984 C18.215,3.415 18.891,2.704 19.426,1.893" opacity=".6"/>
+</svg>

static/assets/img/icons/icon-social-youtube.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="19" height="14" viewBox="0 0 19 14">
+  <path fill="#111" d="M8,9.77777778 L8,4 L12.4347826,6.89851852 L8,9.77777778 Z M18.81,3.02021573 C18.81,3.02021573 18.6242222,1.64811772 18.0552778,1.04407458 C17.3322222,0.25101793 16.5226111,0.248017716 16.1510556,0.20201443 C13.4931667,0 9.50527778,0 9.50527778,0 C9.49683333,0 5.50788889,0 2.85,0.20201443 C2.47738889,0.248017716 1.66777778,0.252018001 0.944722222,1.04407458 C0.374722222,1.64811772 0.19,3.02021573 0.19,3.02021573 C0.19,3.02021573 0,4.63033074 0,6.24044575 L0,7.75255375 C0,9.36266876 0.19,10.9727838 0.19,10.9727838 C0.19,10.9727838 0.374722222,12.3458818 0.944722222,12.949925 C1.66777778,13.7419816 2.61672222,13.7169798 3.04,13.7999857 C4.56,13.9529966 9.5,14 9.5,14 C9.5,14 13.4921111,13.9939996 16.15,13.7919851 C16.5226111,13.7459819 17.3322222,13.7419816 18.0552778,12.9489249 C18.6252778,12.3438817 18.81,10.9717837 18.81,10.9717837 C18.81,10.9717837 19,9.36166869 19,7.75155368 L19,6.24044575 C19,4.63033074 18.81,3.02021573 18.81,3.02021573 Z" opacity=".6"/>
+</svg>