add icons as static files

layouts/partials/header.html

 	    {{ if .Site.Menus.icon }}
 	        <div class="right">
 	        {{ range sort .Site.Menus.icon }}
-		  <a href="{{ .URL }}"><i class="fa fa-{{ .Name }}"></i></a>
+		  <a href="{{ .URL }}"><i class="navbar-icon {{ .Name }}"></i></a>
 		{{ end }}
 		</div>
 	    {{ end }}

static/css/main.css

 /* Navigation */
 
 .navbar-icon {
-    font-size: 125%;
+    width: 1em;
+    height: 1em;
     display: inline-block !important;
 }
 
+.navbar-icon.email {
+    background-image: url('/icons/email.svg');
+}
+
+.navbar-icon.twitter {
+    background-image: url('/icons/twitter.svg');
+}
+.navbar-icon.git {
+    background-image: url('/icons/share.svg');
+}
+
 nav{
     flex: 1 0 auto;
 }

static/icons/email.svg

+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 512 512" style="enable-background:new 0 0 512 512;" xml:space="preserve">
+	<g>
+		<path d="M467,61H45C20.218,61,0,81.196,0,106v300c0,24.72,20.128,45,45,45h422c24.72,0,45-20.128,45-45V106
+			C512,81.28,491.872,61,467,61z M460.786,91L256.954,294.833L51.359,91H460.786z M30,399.788V112.069l144.479,143.24L30,399.788z
+			 M51.213,421l144.57-144.57l50.657,50.222c5.864,5.814,15.327,5.795,21.167-0.046L317,277.213L460.787,421H51.213z M482,399.787
+			L338.213,256L482,112.212V399.787z"/>
+	</g>
+
+</svg>

static/icons/share.svg

+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 19.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 481.6 481.6" style="enable-background:new 0 0 481.6 481.6;" xml:space="preserve">
+<g>
+	<path d="M381.6,309.4c-27.7,0-52.4,13.2-68.2,33.6l-132.3-73.9c3.1-8.9,4.8-18.5,4.8-28.4c0-10-1.7-19.5-4.9-28.5l132.2-73.8
+		c15.7,20.5,40.5,33.8,68.3,33.8c47.4,0,86.1-38.6,86.1-86.1S429,0,381.5,0s-86.1,38.6-86.1,86.1c0,10,1.7,19.6,4.9,28.5
+		l-132.1,73.8c-15.7-20.6-40.5-33.8-68.3-33.8c-47.4,0-86.1,38.6-86.1,86.1s38.7,86.1,86.2,86.1c27.8,0,52.6-13.3,68.4-33.9
+		l132.2,73.9c-3.2,9-5,18.7-5,28.7c0,47.4,38.6,86.1,86.1,86.1s86.1-38.6,86.1-86.1S429.1,309.4,381.6,309.4z M381.6,27.1
+		c32.6,0,59.1,26.5,59.1,59.1s-26.5,59.1-59.1,59.1s-59.1-26.5-59.1-59.1S349.1,27.1,381.6,27.1z M100,299.8
+		c-32.6,0-59.1-26.5-59.1-59.1s26.5-59.1,59.1-59.1s59.1,26.5,59.1,59.1S132.5,299.8,100,299.8z M381.6,454.5
+		c-32.6,0-59.1-26.5-59.1-59.1c0-32.6,26.5-59.1,59.1-59.1s59.1,26.5,59.1,59.1C440.7,428,414.2,454.5,381.6,454.5z"/>
+</g>
+
+</svg>

static/icons/twitter.svg

+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 18.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 112.197 112.197" style="enable-background:new 0 0 112.197 112.197;" xml:space="preserve">
+<g>
+	<circle style="fill:#55ACEE;" cx="56.099" cy="56.098" r="56.098"/>
+	<g>
+		<path style="fill:#F1F2F2;" d="M90.461,40.316c-2.404,1.066-4.99,1.787-7.702,2.109c2.769-1.659,4.894-4.284,5.897-7.417
+			c-2.591,1.537-5.462,2.652-8.515,3.253c-2.446-2.605-5.931-4.233-9.79-4.233c-7.404,0-13.409,6.005-13.409,13.409
+			c0,1.051,0.119,2.074,0.349,3.056c-11.144-0.559-21.025-5.897-27.639-14.012c-1.154,1.98-1.816,4.285-1.816,6.742
+			c0,4.651,2.369,8.757,5.965,11.161c-2.197-0.069-4.266-0.672-6.073-1.679c-0.001,0.057-0.001,0.114-0.001,0.17
+			c0,6.497,4.624,11.916,10.757,13.147c-1.124,0.308-2.311,0.471-3.532,0.471c-0.866,0-1.705-0.083-2.523-0.239
+			c1.706,5.326,6.657,9.203,12.526,9.312c-4.59,3.597-10.371,5.74-16.655,5.74c-1.08,0-2.15-0.063-3.197-0.188
+			c5.931,3.806,12.981,6.025,20.553,6.025c24.664,0,38.152-20.432,38.152-38.153c0-0.581-0.013-1.16-0.039-1.734
+			C86.391,45.366,88.664,43.005,90.461,40.316L90.461,40.316z"/>
+	</g>
+</g>
+
+</svg>