Make frontend customizable

[jaagut]

Add some way to easily change important items of the site, for example make the site title and other objects configurable in the frontend. These changes enable a host to adapt and customize l2ge quickly for their own needs.

Here is a list of items, that could be customized:

• Site title
• Welcome text
• Logo path
• Favicon path

I apologize if some or all of these items are already configurable, I have not enough insight in the frontend.

[ftsell]

• Site title: good idea
• Welcome text: Uhh, which one do you mean?
• Logo Path: We don't display the logo anywhere except the faviocon
• Favicon Path: That is a browser standard. I believe it is possible to change the path but I believe that some way to overwrite the icon would be better

[jaagut]

• Site title: Title of the tab... BTW, maybe we should set this to the current video title?!
• Welcome text: I mean the giant Lecture​2Gether at the front page (and maybe some subtitle)
• Logo Path: @ftsell +1
• Favicon Path: @ftsell +1