Merge pull request #255 from pganssle/prepare-2.5.3-release

Prepare 2.5.3 release.

NEWS

+Version 2.5.3
+-------------
+- Updated zoneinfo to 2016d
+- Fixed parser bug where unambiguous datetimes fail to parse when dayfirst is
+  set to true. (gh issue #233, pr #234)
+- Bug in zoneinfo file on platforms such as Google App Engine which do not
+  do not allow importing of subprocess.check_call was reported and fixed by
+  @savraj (gh issue #239, gh pr #240)
+- Fixed incorrect version in documentation (gh issue #235, pr #243)
+
 Version 2.5.2
 -------------
 - Updated zoneinfo to 2016c

dateutil/__init__.py

 # -*- coding: utf-8 -*-
-__version__ = "2.5.2"
+__version__ = "2.5.3"

zonefile_metadata.json

@@ -4,9 +4,9 @@
         "https://dateutil.github.io/tzdata/tzdata/",
         "ftp://ftp.iana.org/tz/releases/"
     ],
-    "tzdata_file": "tzdata2016c.tar.gz",
-    "tzdata_file_sha512": "03eab77c8b3176da1dd17d1d9062b151036b01d224f1e4b60f34a2db6899150431f34f4d9f39652648aae3a55326fd6f85d6deefe3f27b36eaed9ef39ed3f53c",
-    "tzversion": "2016c",
+    "tzdata_file": "tzdata2016d.tar.gz",
+    "tzdata_file_sha512": "f1beb1793c4c7d18f2dadaf4a928b1476f66b400bda0c87b06155c0dd1c4b4a26bb2f37dc17a3676a2bbe9c1e71a5d8b27a171c797a86464b0bc0d13abfb2f99",
+    "tzversion": "2016d",
     "zonegroups": [
         "africa",
         "antarctica",