fixes, cleanup

web/plugins/geohash/geohash.py

@@ -1,6 +1,8 @@
 from pelican import signals
 import geohash_tools as gh
 
+hashes = []
+
 def generate_geohash(generator):
     for article in generator.articles:
         if "location" in article.metadata:
@@ -8,7 +10,9 @@ def generate_geohash(generator):
             article.metadata['lat'] = lat
             article.metadata['lon'] = lon
             article.metadata['geohash'] = gh.encode(lat, lon, 11)
-            article.slug = gh.encode(lat, lon, 11)
+            if article.metadata['geohash'] not in hashes:
+                article.slug = gh.encode(lat, lon, 11)
+            hashes.append(article.metadata['geohash'])
 
 def register():
     signals.article_generator_finalized.connect(generate_geohash)