Bump several dependencies for Python 3 compatibility

Debug toolbar 1.2 has some more usable panels, and less trouble with
jQuery interactions. It also is the first version to be compatible with
Django 1.7, which we'll support in the upcoming Oscar release.

django-compressor 1.4 has finally been released and supports Python 3
and comes with lots of other goodies.

sorl-thumbnail seems to be barely maintained anymore. I don't dare
switch to the beta version for Python 2. There's a few critical issues
reported on their issue tracker atm:
https://github.com/mariocesar/sorl-thumbnail/issues?labels=critical&page=1&state=open

django-nose-querycount is not Python 3 compatible and has been moved.

requirements.txt

 # Development
-django-debug-toolbar>=1.0.1,<1.1
-django-debug-toolbar-template-timings>=0.5.5
+django-debug-toolbar>=1.2.1,<1.3
+django-debug-toolbar-template-timings==0.6.1
 django-extensions>=1.3.3,<1.4.0
 Werkzeug>=0.9.4,<0.10
 
 coveralls>=0.1.1,<0.2
 purl>=0.4
 behave==1.2.3
-nose-django-querycount==0.3
 factory-boy==2.3.1
 
 # Misc

requirements_py2.txt

 
 detox==0.9.3
 transifex-client==0.10
+nose-django-querycount==0.3

setup.py

           # Treebeard is used for categories
           'django-treebeard==2.0',
           # Sorl is used as the default thumbnailer
-          'sorl-thumbnail==12.00' if PY3 else 'sorl-thumbnail==11.12',
+          'sorl-thumbnail==11.12.1b' if PY3 else 'sorl-thumbnail==11.12',
           # Babel is used for currency formatting
           'Babel>=1.0,<1.4',
           # Oscar's default templates use compressor (but you can override
           # this)
-          'django-compressor==1.4a1' if PY3 else 'django-compressor==1.3',
+          'django-compressor==1.4',
           # For converting non-ASCII to ASCII when creating slugs
           'Unidecode>=0.04.12,<0.05',
           # For manipulating search URLs
           # Python 2 & 3 compatibility helper
           'six>=1.5.2',
       ],
-      # tarballs for unreleased packages
-      dependency_links = [
-          'http://github.com/mariocesar/sorl-thumbnail/tarball/34e1ffa2a1bcbf048541dd28db3a78d9d9b93ad7#egg=sorl-thumbnail-12.00',
-          'http://github.com/django-compressor/django-compressor/tarball/aba8c5f6b59dd78831d2bf1e53222f8475b2f9f8#egg=django-compressor-1.4a1',
-      ],
       # See http://pypi.python.org/pypi?%3Aaction=list_classifiers
       classifiers=[
           'Development Status :: 4 - Beta',