Update project metadata

Point people to GitHub, not Launchpad. All that's left on Launchpad are
a bunch of stale bugs.

Update the author field to reflect the large number of contributors.
Remove the maintainer field because a bug in something (setuptools?)
overwrites the author field with the maintainer field when the package
gets uploaded to PyPI.

AUTHORS

@@ -1,4 +1,3 @@
-
 Contributors
 ------------
 
@@ -18,3 +17,6 @@ Contributors
 * Marcin Cieślak
 * Steven Myint
 * Ignas Mikalajūnas
+
+See also the contributors list on GitHub:
+https://github.com/pyflakes/pyflakes/graphs/contributors

setup.py

@@ -40,11 +40,9 @@ def get_long_description():
     version=get_version(),
     description="passive checker of Python programs",
     long_description=get_long_description(),
-    author="Phil Frost",
-    author_email="[email protected]",
-    maintainer="Florent Xicluna",
-    maintainer_email="[email protected]",
-    url="https://launchpad.net/pyflakes",
+    author="A lot of people",
+    author_email="[email protected]",
+    url="https://github.com/pyflakes/pyflakes",
     packages=["pyflakes", "pyflakes.scripts", "pyflakes.test"],
     classifiers=[
         "Development Status :: 6 - Mature",