Merge branch 'master' of git.o2w.es:o2w/sqlbuilder into HEAD

sqlquerybuilder/__init__.py

@@ -292,6 +292,9 @@ class SQLQuery(object):
         clone._group_by = args
         return clone
 
+    def first(self):
+        return self[:1]
+
     def join(self, table, on="", how="inner join"):
         clone = self._clone()
         if on: