Bug 1341215 - Vendor dlmanager. r=chmanchester

from https://github.com/parkouss/dlmanager

Note this technically should come before the first patch, but mozreview
won't show useful interdiffs if I do that, so I'll reorder the patches
before landing.

python/dlmanager/setup.py

@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+
+import os
+import re
+import sys
+from setuptools import setup
+from setuptools.command.test import test as TestCommand
+
+HERE = os.path.dirname(os.path.realpath(__file__))
+
+
+class PyTest(TestCommand):
+    """
+    Run py.test with the "python setup.py test command"
+    """
+    user_options = [('pytest-args=', 'a', "Arguments to pass to py.test")]
+
+    def initialize_options(self):
+        TestCommand.initialize_options(self)
+        self.pytest_args = ''
+
+    def finalize_options(self):
+        TestCommand.finalize_options(self)
+        self.pytest_args += (' ' + self.distribution.test_suite)
+
+    def run_tests(self):
+        import pytest
+        errno = pytest.main(self.pytest_args)
+        sys.exit(errno)
+
+
+def read(*parts):
+    with open(os.path.join(HERE, *parts)) as f:
+        return f.read()
+
+
+def parse_requirements(data, exclude=()):
+    return [line for line in data.splitlines()
+            if line and not line.startswith("#") and line not in exclude]
+
+
+def version():
+    return re.findall(r"__version__ = \"([\d.]+)\"",
+                      read("dlmanager", "__init__.py"))[0]
+
+setup(
+    name="dlmanager",
+    version=version(),
+    description="download manager library",
+    long_description=read("README.rst"),
+    author="Julien Pagès",
+    author_email="j.parkouss@gmail.com",
+    url="http://github.com/parkouss/dlmanager",
+    license="GPL/LGPL",
+    install_requires=parse_requirements(read("requirements.txt")),
+    cmdclass={'test': PyTest},
+    tests_require=parse_requirements(read("requirements.txt"),
+                                     exclude=("-e .",)),
+    test_suite='tests',
+)