Some changes to the original files

I made som changes to add the links and fixed some odds. Also modified
one image's dropshadow
Spanish subdirectory and files

Re-wrote the HTML code to make it more standard, but keep the structure.

Added the Spanish subdirectory 'es' and translated the entire content.

I have the 'es' HTML structure in English if we plan to use this new
re-writen HTML and not the old one.