Fixing setup.py if django is not installed.

djadmin2 must not be imported in setup.py because this triggers an import of
django and other dependencies which will obviously fail if they are not
installed.

setup.py

@@ -7,12 +7,20 @@ import os
 import sys
 
 
+def get_author(package):
+    """
+    Return package version as listed in `__version__` in `init.py`.
+    """
+    init_py = open(os.path.join(package, '__init__.py')).read()
+    return re.search("__author__ = ['\"]([^'\"]+)['\"]", init_py).group(1)
+
+
 def get_version(package):
     """
     Return package version as listed in `__version__` in `init.py`.
     """
     init_py = open(os.path.join(package, '__init__.py')).read()
-    return re.match("__version__ = ['\"]([^'\"]+)['\"]", init_py).group(1)
+    return re.search("__version__ = ['\"]([^'\"]+)['\"]", init_py).group(1)
 
 
 def get_packages(package):
@@ -40,6 +48,7 @@ def get_package_data(package):
     return {package: filepaths}
 
 
+author = get_author('djadmin2')
 version = get_version('djadmin2')
 
 
@@ -50,8 +59,6 @@ if sys.argv[-1] == 'publish':
     print("  git push --tags")
     sys.exit()
 
-import djadmin2
-
 LONG_DESCRIPTION = open('README.rst').read()
 
 setup(
@@ -73,7 +80,7 @@ setup(
         "Topic :: Software Development :: Libraries :: Python Modules",
     ],
     keywords='django,admin',
-    author=djadmin2.__author__,
+    author=author,
     author_email='pydanny@gmail.com',
     url='http://github.com/pydanny/django-admin2',
     license='MIT',