Timestamps are int64, not uint64

nilmdb/client/client.py

@@ -193,7 +193,7 @@ class Client(object):
         Specify binary = True to return chunks of raw binary data,
         rather than lines of ASCII-formatted data.  Raw binary data
         is always little-endian and matches the database types
-        (including a uint64 timestamp).
+        (including an int64 timestamp).
         """
         params = {
             "path": path,

nilmdb/server/server.py

@@ -414,8 +414,8 @@ class Stream(NilmApp):
 
         If 'binary' is True, return raw binary data, rather than lines
         of ASCII-formatted data.  Raw binary data is always
-        little-endian and matches the database types (including a
-        uint64 timestamp).
+        little-endian and matches the database types (including an
+        int64 timestamp).
         """
         (start, end) = self._get_times(start, end)