Better directory and helpful texts

There hasn't been much coding on Ambedo lately but now I've fixed the directory so that it is better. It now only lists tags when you actually search or browse for them. Also added a bunch of helpful links and texts across the site which hopefully will make it easier for people other than me to use the site and understand what it's all about. Feel free to let me know what else I can do to make Ambedo easier to use and understand. I use the site as my start page and it saves my loads of time every day. I really wish Ambedo would help other people as much.