Use requests library instead of raw urllib2

This commit is a foundation upon a more robust image fetching code
will be built in the future, and it already fixes at least one weird
issue I've seen.

pinry/core/models.py

@@ -1,4 +1,4 @@
-import urllib2
+import requests
 from cStringIO import StringIO
 
 from django.core.files.uploadedfile import InMemoryUploadedFile
@@ -15,8 +15,10 @@ class ImageManager(models.Manager):
     def create_for_url(self, url):
         file_name = url.split("/")[-1]
         buf = StringIO()
-        buf.write(urllib2.urlopen(url).read())
-        obj = InMemoryUploadedFile(buf, 'image', file_name, None, buf.tell(), None)
+        response = requests.get(url)
+        buf.write(response.content)
+        obj = InMemoryUploadedFile(buf, 'image', file_name,
+                                   None, buf.tell(), None)
         return Image.objects.create(image=obj)
 
 
@@ -37,4 +39,4 @@ class Pin(models.Model):
     tags = TaggableManager()
 
     def __unicode__(self):
-        return self.url
+        return self.url

requirements.txt

@@ -6,5 +6,6 @@ django-braces
 mock
 factory-boy
 django_compressor
+requests
 http://github.com/kklimonda/django-images/tarball/master#egg=django-images
 http://github.com/hcarvalhoalves/django-taggit/tarball/master#egg=django-taggit

setup.py

@@ -20,6 +20,7 @@ install_requires = [
     'django-tastypie',
     'django-braces',
     'django_compressor',
+    'requests',
     'django-images>=2013.1.99',
     'django-taggit>=0.9.3.99'
 ]