Add top-level setup.py to make pip install git+https work.

setup.py

@@ -0,0 +1,50 @@
+try:
+	from setuptools import setup, Extension
+except ImportError:
+	print("Note: couldn't import setuptools so using distutils instead.")
+	from distutils.core import setup, Extension
+
+import os, sys
+
+if sys.version_info >= (3,0):
+	root_dir = 'py-appscript/trunk/appscript_3x'
+else:
+	root_dir = 'py-appscript/trunk/appscript_2x'
+
+
+setup(
+		name = "appscript",
+		version = "1.0.0",
+		description = "Control AppleScriptable applications from Python.",
+		url='http://appscript.sourceforge.net',
+		license='Public Domain',
+		platforms=['Mac OS X'],
+		ext_modules = [
+			Extension('aem.ae',
+				sources=[os.path.join(root_dir, 'ext/ae.c')],
+				extra_compile_args=['-DMAC_OS_X_VERSION_MIN_REQUIRED=MAC_OS_X_VERSION_10_4'],
+				extra_link_args=[
+						'-framework', 'CoreFoundation', 
+						'-framework', 'ApplicationServices',
+						'-framework', 'Carbon'],
+			),
+		],
+		packages = [
+			'aem',
+			'appscript',
+		],
+		py_modules=[
+			'mactypes',
+			'osax',
+		],
+		extra_path = "aeosa",
+		package_dir = {'': os.path.join(root_dir, 'lib')},
+		classifiers = [
+			'License :: Public Domain',
+			'Development Status :: 5 - Production/Stable',
+			'Operating System :: MacOS :: MacOS X',
+			'Programming Language :: Python :: 2',
+			'Programming Language :: Python :: 3',
+		],
+
+)