Add the MIT license by default.

{{cookiecutter.package_name}}/LICENSE.rst

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) {% now 'local', '%Y' %} {{ cookiecutter.author_name }}
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

{{cookiecutter.package_name}}/setup.py

@@ -17,6 +17,7 @@ setup(
     name="{{ cookiecutter.package_name }}",
     version="{{ cookiecutter.package_version }}",
     url="{{ cookiecutter.package_url }}",
+    license='MIT',
 
     author="{{ cookiecutter.author_name }}",
     author_email="{{ cookiecutter.author_email }}",
@@ -30,6 +31,7 @@ setup(
 
     classifiers=[
         'Development Status :: 2 - Pre-Alpha',
+        'License :: OSI Approved :: MIT License',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',