added link to the source code

index.html

@@ -183,6 +183,8 @@
         or select one here<br><input type="file" id="sav_file" name="sav_file" />
       </div>
 
+      <br><center><b><a href="https://github.com/rakion99/shelter-editor"><font color="white">Go to the source code</font></a></b></center>
+      <br><center><label><font color="red">Updated by rakion99</font></label></center>
       <div class="presets">
         <br><center><b>EXTRAS</b></center>
         <br><label title="Savefile names can only be 'Vault1.sav', 'Vault2.sav' or 'Vault3.sav'">Savefile Name: </label> <input type="text" name="presetSaveName" id="presetSaveName" placeholder="Vault1.sav" value="Vault1.sav" ><hr>