Make the license fully selectable by cookiecutter if possible

[jacebrowning]

Also, MIT is probably a better default license.

[joshfriend]

I think you could do this using Jinja template test statements

{% if cookiecutter.license == 'MIT' %}
MIT LICENSE HERE
{% else %}
... other stuff...
{% endif %}

[sheplecjs]

#208 MIT default with options for Apache-2.0, AGPL-3.0-only, and Unlicense.