Include the actual GPL

Sections 4 and 5 require a copy to be included.
Of course, this does not apply to the original
authors (since they own the copyright),
but anyone who forks without including a copy
would technically be in violation of the license.

The Free Software Foundation's view on this issue:
http://www.gnu.org/licenses/gpl-faq.html#WhyMustIInclude
Merge pull request #165 from jack126guy/actualgpl

Include the actual GPL