GitHub bmihelac -> django-import-export Account Update

Updating both the CONTRIBUTING documentation as well as the url defined
in setup tools for the package.

CONTRIBUTING.md

@@ -23,8 +23,8 @@ So you've found a bug or have a great idea for a feature. Here's the steps you
 should take to help get it added/fixed in django-import-export:
 
 * First, check to see if there's an existing issue/pull request for the
-  bug/feature. All issues are at https://github.com/bmihelac/django-import-export/issues
-  and pull reqs are at https://github.com/bmihelac/django-import-export/pulls.
+  bug/feature. All issues are at https://github.com/django-import-export/django-import-export/issues
+  and pull reqs are at https://github.com/django-import-export/django-import-export/pulls.
 * If there isn't one there, please file an issue. The ideal report includes:
     * A description of the problem/suggestion.
     * How to recreate the bug.

setup.py

@@ -29,7 +29,7 @@
     author_email="[email protected]",
     license='BSD License',
     platforms=['OS Independent'],
-    url="https://github.com/bmihelac/django-import-export",
+    url="https://github.com/django-import-export/django-import-export",
     packages=find_packages(exclude=["tests"]),
     include_package_data=True,
     install_requires=install_requires,