Temporary fix for broken links in zetacomponents.org site, mainly in documentation part.

All documentation tutorials links pointing to api are broken.

Warning : this is a Quick-and-dirty fix:

A javascript code has been added to 404.html file that checks if the asked url starts with /zetacomponents/ if so it redirects the user to the proper target url by removing /zetacomponents/ from it.

I have two propals for definitive solution :
	- create a zetacomponent folder and move documentation into it
	- replace all occurences of /zetacomponent/ in all files
	
Thanks and happy new year