License of izpack.org website changed to CC BY 4.0

[René Krell]

Just for your information:

I changed the license of the izpack.org website to Creative Commons Attribution 4.0 International License.

This license is more open also for commercial usage.

There has been no reason for limiting the license to non-commercial usage, similar as the Apache 2.0 license we use for the IzPack code.

Enjoy the summer time,

René