Adding license clause to example files.

[timothysc]

https://bugzilla.redhat.com/show_bug.cgi?id=1112337

• Should add license/copyright text to the four example-code files
  under /usr/share/doc/picojson-devel/examples

[kazuho]

Thank you for bringing up the issue. Made the necessary changes (thanks to @mattn) and tagged the updated version as v1.1.1.

[timothysc]

Thanks for all the help, now available in Fedora channels:

http://koji.fedoraproject.org/koji/packageinfo?packageID=18695

[kazuho]

Wow! Thanks a lot!