Overpass generator string now includes version number

[mmd-osm]

Recently, a version number was added to the generator string, e.g. <osm version="0.6" generator="Overpass API 0.7.54.12 054bb0bb">. Unfortunately, this change breaks Achavi. The following patch should fix it:

diff --git a/js/FormatRegistry.js b/js/FormatRegistry.js
index 59c350c..1c534b2 100644
--- a/js/FormatRegistry.js
+++ b/js/FormatRegistry.js
@@ -36,7 +36,7 @@ FormatRegistry.prototype.getFormatType = function(doc) {
     // special cases with common root node name but different content 
     if (type === 'osm') {
         var generatorAttribute = doc.documentElement.getAttribute('generator');
-        if (generatorAttribute && generatorAttribute === 'Overpass API') {
+        if (generatorAttribute && generatorAttribute.indexOf('Overpass API') == 0) {
             type = 'osmDiff';
         } else {
             var node = doc.documentElement.firstChild

[HolgerJeromin]

startsWith does not work with Internet Explorer. So i would suggest indexOf

[mmd-osm]

@HolgerJeromin : good point, patch updated accordingly.