Finalise initial release of 'find by headcode', bump version

pis.html

@@ -45,6 +45,16 @@
     <div id="crs-box">
         <p>Currently supported (Beta): GWR: ex-Wessex, HEx<br>Duplicate stopping patterns have been removed.</p>
         <p id="auth-required">You need to be logged into a free <a href="./settings.html#railstaff">rail staff version</a> account for this feature.</p>
+        <h3>Search by Headcode</h3>
+        <form action="javascript:findByHeadcode();">
+          <div id="crs-inputs">
+            <div class="crs-input">
+              <label for="pis">PIS Code:</label><br>
+              <input type="text" class="small-lookup-box pis-input" id="headcode" name="headcode" maxlength="4" autocomplete="off"><br><br>
+            </div>
+          </div>
+          <button type="submit" value="Find" class="lookup-button">Submit</button>
+        </form>
         <h3>Search by CRS Codes</h3>  
           <form action="javascript:findByOrigDest();">
             <div id="crs-inputs">