add user references for ptg (loopbackio#864)

Author: agnes512

images/users/logo_ptg.png

@@ -241,28 +241,34 @@ <h3 class="section-heading">Who's using LoopBack?</h3>
             </div>
             <p></p>
             <div class="row text-center" style="justify-content: center">
-                <div class="col-md-3">
+                <div class="col-md-2">
                     <span class="helper"></span>
                     <a href="https://www.publicissapient.com/" target="_blank">
-                        <img src="images/users/sapient.png" width="50%"/>
+                        <img src="images/users/sapient.png" width="70%"/>
                     </a>
                 </div>
                 <div class="col-md-3">
                     <span class="helper"></span>
                     <a href="https://humansofcode.com/" target="_blank">
-                        <img src="images/users/hoc_logo_dark.png" width="90%"/>
+                        <img src="images/users/hoc_logo_dark.png" width="80%"/>
                     </a>
                 </div>
-                <div class="col-md-3">
+                <div class="col-md-2">
                     <span class="helper"></span>
                     <a href="http://www.eycgrupo.com/" target="_blank">
-                        <img src="images/users/eyc-logo.png" width="40%"/>
+                        <img src="images/users/eyc-logo.png" width="60%"/>
                     </a>
                 </div>
-                <div class="col-md-3">
+                <div class="col-md-2">
                     <span class="helper"></span>
                     <a href="https://www.fundrails.com/" target="_blank">
-                        <img src="images/users/Fundrails-Logo.png" width="60%"/>
+                        <img src="images/users/Fundrails-Logo.png" width="70%"/>
+                    </a>
+                </div>
+                <div class="col-md-2">
+                    <span class="helper"></span>
+                    <a href="https://www.pitagorinesgroup.com/en/" target="_blank">
+                        <img src="images/users/logo_ptg.png" width="70%"/>
                     </a>
                 </div>
             </div>
@@ -365,6 +371,17 @@ <h3 class="section-heading">What our users say</h3>
                 <br>
                 <b>- Benjamin Boudreau, FoKo Software Developer</b>
                 </div>
+            </div>  
+            <br>
+            <br>
+            <div class="row text-center" style="justify-content: right">
+                <div class="col-md-6" style="text-align: left; padding-right:60px">
+                    "Our company has been using LoopBack for several years. We started using it from its beginnings and the truth is that we love this new version. We want to congratulate the Strongloop Team from PTG Team for making developer's life a bit easier."
+                    <br>
+                    <br>
+                    <br>
+                    <b>- Jesús Mora, CTO & Co-Founder, Pitagorines Group</b>
+                </div>
             </div>   
         </div>
     </section>