[empathy/gnome-3-10] release.py: use dateutil's parser

[Guillaume Desmottes <gdesmott src gnome org>]

commit 63c723259e40da25c7ab3a8be1b05a2083fa9915
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Thu Oct 31 13:46:47 2013 +0100

    release.py: use dateutil's parser
    
    Makes code much easier and fix a crash if the commit date includes a negative
    timezone offset (like 'Mon Oct 14 13:13:03 2013 -0400').

 release.py |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)
---
diff --git a/release.py b/release.py
index 5b13240..59919e8 100755
--- a/release.py
+++ b/release.py
@@ -1,13 +1,12 @@
 #!/usr/bin/env python
 
 import os
-import re
 import urllib
 import csv
 import datetime
-import time
 from string import Template
 from optparse import OptionParser
+import dateutil.parser
 
 last_tag_pattern = 'EMPATHY_3_10*'
 upload_server = 'master.gnome.org'
@@ -172,9 +171,9 @@ class Project:
                commit_str = self.exec_cmd('git show %s' % (self.last_tag))
                for line in commit_str.splitlines():
                        if line.startswith('Date:'):
-                               time_str = line[5:line.rfind('+')].strip()
-                               t = time.strptime(time_str)
-                               last_tag_date = time.strftime('%Y-%m-%d', t)
+                               time_str = line[5:]
+                               t = dateutil.parser.parse(time_str)
+                               last_tag_date = t.strftime('%Y-%m-%d')
                                break
 
                query = 'http://bugzilla.gnome.org/buglist.cgi?' \