Pin factory-boy dependency on 1.3.x branch

Factory Boy 2.0 have removed the "extracted_key" keyword argument from
post_generation() hook. Until we can update tests to work with 2.0 make
dependency on 1.3.x branch. In turn, the update got stalled by a bug
in Factory Boy (https://github.com/rbarrois/factory_boy/issues/53).

requirements.txt

@@ -4,7 +4,7 @@ South
 django-tastypie==0.9.12
 django-braces
 mock
-factory-boy
+factory-boy>=1.3,<2.0
 django_compressor
 requests
 http://github.com/kklimonda/django-images/tarball/master#egg=django-images

setup.py

@@ -38,7 +38,7 @@ setup(
     packages=find_packages(exclude=["*.tests", "*.tests.*", "tests.*", "tests"]),
     long_description=read('README.md'),
     dependency_links=dependency_links,
-    tests_require=['mock', 'factory-boy'],
+    tests_require=['mock', 'factory-boy>=1.3,<2.0'],
     install_requires=install_requires,
     classifiers=[
         "Development Status :: 4 - Beta",