Add IDs to homepage sections and footer.

Author: BigBlueHat

_layouts/fomantic.liquid

@@ -118,8 +118,8 @@
     {{ content }}
     </div>
 
-    <div class="ui basic footer segment">
-      <div class="ui container">
+    <div class="ui basic footer segment" id="footer">
+      <div class="ui container" id="copyright">
         <p>Website content released under a
           <a href="https://creativecommons.org/about/cc0">Creative Commons CC0 Public Domain Dedication</a>
           except where an alternate is specified.</p>

index.liquid

@@ -58,7 +58,7 @@ masthead:
   <a href="./playground/" class="ui primary big button">Launch the JSON-LD Playground</a>
 </div>
 
-<div class="ui center aligned massive basic segment grid">
+<div class="ui center aligned massive basic segment grid" id="developers">
   <div class="ui header">
     <i class="cog icon"></i>
     <span class="content">Developers</span>
@@ -84,7 +84,7 @@ masthead:
   {% include 'implementation-card' language: 'TypeScript' %}
 </div>
 
-<div class="ui basic center aligned segment">
+<div class="ui basic center aligned segment" id="tests-description">
   <p>
     The <a href="https://w3c.github.io/json-ld-api/tests/">JSON-LD Test
     Suite</a> (and <a
@@ -97,7 +97,7 @@ masthead:
   </p>
 </div>
 
-<div class="ui center aligned massive basic segment grid">
+<div class="ui center aligned massive basic segment grid" id="collaborating">
   <div class="ui header">
     <i class="group icon"></i>
     <span class="content">Getting Help / Collaborating</span>
@@ -179,7 +179,7 @@ masthead:
 
 <div class="ui divider"></div>
 
-<div class="ui center aligned massive basic segment grid">
+<div class="ui center aligned massive basic segment grid" id="learn-more">
   <div class="ui header">
     <i class="book icon"></i>
     <span class="content">Learn More...</span>