Fixes #33 - Adjustments to features section of index page

includes/features.html

-<div class="container text-center content">
-  <div class="row item-group">
-    <div class="column one-third item">
+<div id="features" class="container content">
+  <div class="row">
+    <div class="column one-third">
       <img
         height="90px"
         width="90px"
         src="/img/feature-fast.png"
         srcset="/img/feature-fast.svg 2x"
         alt="{{ feature-faster-alt[alt text] Rocket }}">
-      <h2 class="item-heading">{{ feature-faster-heading[heading] Faster, More Enjoyable Browsing }}</h2>
-      <p class="item-body">{{ feature-faster-body Block ads that interrupt your browsing experience. Say goodbye to video ads, pop-ups, flashing banners and more. Blocking these annoyances means pages load faster. }}</p>
+      <h2>{{ feature-faster-heading[heading] Faster, More Enjoyable Browsing }}</h2>
+      <p>{{ feature-faster-body Block ads that interrupt your browsing experience. Say goodbye to video ads, pop-ups, flashing banners and more. Blocking these annoyances means pages load faster. }}</p>
     </div>
-    <div class="column one-third item">
+    <div class="column one-third">
       <img
         height="90px"
         width="90px"
         src="/img/feature-safe.png"
         srcset="/img/feature-safe.svg 2x"
         alt="{{ feature-safe-alt[alt text] Padlock }}">
-      <h2 class="item-heading">{{ feature-safe-heading[heading] Keep Your Data And Devices Safe }}</h2>
-      <p class="item-body">{{ feature-safe-body With Adblock Plus avoiding tracking and malware is easy. Blocking intrusive ads reduces the risk of "malvertizing" infections. Blocking tracking stops companies following your online activity. }}</p>
+      <h2>{{ feature-safe-heading[heading] Keep Your Data And Devices Safe }}</h2>
+      <p>{{ feature-safe-body With Adblock Plus avoiding tracking and malware is easy. Blocking intrusive ads reduces the risk of "malvertizing" infections. Blocking tracking stops companies following your online activity. }}</p>
     </div>
-    <div class="column one-third item">
+    <div class="column one-third">
       <img
         height="90px"
         width="90px"
         src="/img/feature-aa.png"
         srcset="/img/feature-aa.svg 2x"
         alt="{{ feature-aa-alt[alt text] Checkmark in an octagon }}">
-      <h2 class="item-heading">{{ feature-aa-heading[heading] Not All Ads Are Bad }}</h2>
-      <p class="item-body">{{ feature-aa-body Websites need money to stay free. Support them by allowing Acceptable Ads (enabled by default). Want to hide all ads? No problem. <a href="acceptable-ads#optout">Learn how</a> }}</p>
+      <h2>{{ feature-aa-heading[heading] Not All Ads Are Bad }}</h2>
+      <p>{{ feature-aa-body Websites need money to stay free. Support them by allowing Acceptable Ads (enabled by default). Want to hide all ads? No problem. <a href="acceptable-ads#optout">Learn how</a> }}</p>
     </div>
   </div>
 </div>