Bug corrections discussed via e-mail

This PR will solve the problem with lazy loading. The #load_more element wasn't used and was even hidden in CSS. So, I simply deleted it and corrected the JS script accordingly. This element is not present in Marigolds, and even if I remember that I had a clear usage scenario in mind when I added it, I can't remember any usage scenario which would need it. Don't hesitate to tell me if you think dropping it is a bad decision.

I also setted more aggressive permission, which are nearly minimal (chmod 644) on the greeder template. These should be ok with most configurations, and a 755 (or 777) as it was before can lead to security flaws. You shouldn't have to change the permissions to use greeder, unless you have some misconfigurations somewhere.