fix(mdTabs): use md-icon for pagination arrows

Update SVG icon registry for pagination arrows

Closes #1464
Closes #1466

Author: Marcy Sutton

docs/app/img/icons/tabs-arrow.svg

@@ -16,7 +16,7 @@
             style="min-width: 72px;"
             layout="row" layout-align="center center"
             ng-click="demoCtrl.$showSource = !demoCtrl.$showSource">
-            <md-icon svg-src="img/icons/ic_visibility_24px.svg"
+            <md-icon md-svg-src="img/icons/ic_visibility_24px.svg"
                style="margin: 0 4px 0 0;">
             </md-icon>
             Source

docs/app/partials/docs-demo.tmpl.html

@@ -61,7 +61,7 @@ <h2 class="menu-heading" ng-if="section.type === 'heading'" id="heading_{{ secti
 
       <div class="md-toolbar-tools" ng-click="openMenu()">
         <button class="menu-icon" hide-gt-sm aria-label="Toggle Menu">
-          <md-icon svg-src="img/icons/ic_menu_24px.svg"></md-icon>
+          <md-icon md-svg-src="img/icons/ic_menu_24px.svg"></md-icon>
         </button>
 
         <div layout="row" flex class="fill-height">
@@ -88,7 +88,7 @@ <h2 class="menu-heading" ng-if="section.type === 'heading'" id="heading_{{ secti
             <md-button ng-class="{hide: !currentDoc || !currentDoc.hasDemo}"
               ng-href="#/demo/{{currentComponent.name}}"
               style="position: relative; padding-left: 30px; margin-right: 15px;">
-              <md-icon svg-src="img/icons/ic_play_arrow_24px.svg" style="
+              <md-icon md-svg-src="img/icons/ic_play_arrow_24px.svg" style="
                   height: 36px;
                   position: absolute;
                   left: 0px;
@@ -101,7 +101,7 @@ <h2 class="menu-heading" ng-if="section.type === 'heading'" id="heading_{{ secti
               ng-href="{{currentDoc.githubUrl}}"
               hide-sm hide-md
               style="position: relative; padding-left: 30px; margin-right: 15px;">
-              <md-icon svg-src="img/icons/ic_launch_24px.svg" style="
+              <md-icon md-svg-src="img/icons/ic_launch_24px.svg" style="
                   height: 36px;
                   position: absolute;
                   left: 0px;