Fix getting first item in OrderedDict

Since keys() and values() now return lists (for compatibility with
python3), they just need to be indexed.

Author: xylar

mpas_analysis/shared/html/pages.py

@@ -408,9 +408,9 @@ def get_first_image(self):
         Xylar Asay-Davis
         """
         # get the first image name
-        firstGroup = self.groups.values().next()
-        firstGallery = firstGroup['galleries'].values().next()
-        firstImageFileName = firstGallery['images'].keys().next()
+        firstGroup = self.groups.values()[0]
+        firstGallery = firstGroup['galleries'].values()[0]
+        firstImageFileName = firstGallery['images'].keys()[0]
         return firstImageFileName
 
     @staticmethod
@@ -493,8 +493,8 @@ def _generate_quick_link_text(self, groupName, groupDict):
         content
         """
 
-        firstGallery = groupDict['galleries'].values().next()
-        firstImageFileName = firstGallery['images'].keys().next()
+        firstGallery = groupDict['galleries'].values()[0]
+        firstImageFileName = firstGallery['images'].keys()[0]
 
         replacements = {'@analysisGroupName': groupName,
                         '@analysisGroupLink': groupDict['link'],