Rename company_logo.png to diffy_logo.png

Also update the alt text to "Diffy".

Change-Id: I2f94f2917f06a1fe8c19b23b9a2614dea6e310b8
diff --git a/_includes/footer.html b/_includes/footer.html
index ec05192..9f9e9ef 100755
--- a/_includes/footer.html
+++ b/_includes/footer.html
@@ -3,7 +3,7 @@
                 <div class="col-lg-12 footer">
                &copy;{{ site.time | date: "%Y"  }} {{site.company_name}}. All rights reserved. <br />
 {% if page.last_updated %}<span>Page last updated:</span> {{page.last_updated}}<br/>{% endif %} Site last generated: {{ site.time | date: "%b %-d, %Y"  }} <br />
-<p><img src="{{ "/images/company_logo.png" }}" alt="Company logo"/></p>
+<p><img src="{{ "/images/diffy_logo.png" }}" alt="Diffy"/></p>
 <p><a href="https://www.google.com/policies/privacy/">Privacy Notice</a></p>
                 </div>
             </div>
diff --git a/images/company_logo.png b/images/diffy_logo.png
similarity index 100%
rename from images/company_logo.png
rename to images/diffy_logo.png
Binary files differ