The current license was picked due the fact that we saw from our other projects that many people using our code without leaving any kind of credits. You, Princess Twilight Sparkle, have our permission (included in the license!) to change the theme in your mind AS LONG AS you keep footer credits which definitely link to us directly. This is the general reason for this license, we want people to respect our work and keep credits. But you need also to state that this is a work in progress, we might can decide in some days to fully change the whole templating and CSS usages. If you have any further questions, do not hesitate to ask again.
Also we have actually split our whole system to a MVC model (nearly), the idea is you can simple copy paste 'default' folder in opensteam/WEB/themes/ and simple rename it and create in this folder your whole own template. Which can be later handled as pull request.
I know there some things which are globalized handled in inc/common.php, however I will soon start to exclude it and have it fully in the theme folder. But for this i need to finish first my other work on our other project :-)
Edit:
And your site is very slow.... ~25 seconds to load. Im not sure if this is my location or whatever.
Small speedtest from global location (NY City) = 34.19s
Tested our site once from the same location = 1.25s
Used:
http://tools.pingdom.com/fpt/
Just as suggestion, first fix and manage your site, and then you can create a template (no offense here, just facts :-P)
Then we should be in the process where we wont change design and further things :-)
Best Regards,
Grief-Code