use relative links to work behind a proxy

dream/platform/static/index.html

@@ -30,7 +30,7 @@
         <a id="zoom_in">Zoom +</a>
         <a id="zoom_out">Zoom -</a>
         <a id="export">Export</a>
-        <form id="export_form" style="display:none" method="post" action="/postJSONData">
+        <form id="export_form" style="display:none" method="post" action="../postJSONData">
           <textarea id="export_json" name="data"></textarea>
         </form>
         <a id="import">Import</a>

dream/platform/static/src/dream.js

@@ -260,7 +260,7 @@
       that.setGeneralProperties(properties);
 
       $.ajax(
-        '/runSimulation', {
+          '../runSimulation', {
           data: JSON.stringify({
             json: that.getData()
           }),

dream/platform/static/src/dream_launcher.js

@@ -30,7 +30,7 @@
     var configuration = { };
 
     $.ajax(
-      '/getConfigurationDict', {
+        '../getConfigurationDict', {
        success: function (data) {
          configuration = $.extend(configuration, data);
 
@@ -232,7 +232,7 @@
     $("#import_file").change(function () {
       var form = $(this).parent('form')[0];
       var form_data = new FormData(form);
-      $.ajax('/postJSONFile', {
+      $.ajax('../postJSONFile', {
         type: 'POST',
         contentType: false,
         processData: false,