[cmpcodesize] Use setuptools for installation

By adding a setup.py file, users may install cmpcodesize to their PATH,
by running `python utils/cmpcodesize/setup.py install`.

Should the Swift project choose to do so, this package may also be uploaded
to the Python Package Index (https://pypi.python.org/pypi). Doing so would
allow anyone with an Internet connection to install cmpcodesize by
running `pip install cmpcodesize`.

Setuptools also provides a convenient way to run unit tests (yet to be
added as of this commit).

Author: modocache

utils/cmpcodesize/.gitignore

@@ -0,0 +1,26 @@
+# Compile artifacts
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Distribution/packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt

utils/cmpcodesize/setup.py

@@ -0,0 +1,41 @@
+import os
+import setuptools
+
+import cmpcodesize
+
+# setuptools expects to be invoked from within the directory of setup.py,
+# but it is nice to allow `python path/to/setup.py install` to work
+# (for scripts, etc.)
+os.chdir(os.path.dirname(os.path.abspath(__file__)))
+
+setuptools.setup(
+    name="cmpcodesize",
+    version=cmpcodesize.__version__,
+
+    author=cmpcodesize.__author__,
+    author_email=cmpcodesize.__email__,
+    url='http://swift.org',
+    license='Apache',
+
+    description="A tool to compare the size of Swift compiler build products.",
+    keywords='compare size swift',
+
+    classifiers=[
+        'Development Status :: 3 - Alpha',
+        'Environment :: Console',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: Apache Software License',
+        'Natural Language :: English',
+        'Operating System :: OS Independent',
+        'Programming Language :: Python',
+        'Topic :: Software Development :: Compilers',
+    ],
+
+    zip_safe=False,
+    packages=setuptools.find_packages(),
+    entry_points={
+        'console_scripts': [
+            'cmpcodesize = cmpcodesize:main',
+        ],
+    }
+)