[BUG] #209 - URL encoding 

Fixing bug #209

 - DBpedia Spotlight can not retrieve the document when a URI or a URL contains special characters 

E.g:

http://noticias.br.msn.com/mundo/ap%C3%B3s-transplante-de-pulm%C3%A3o-homem-nada-24-km-em-fuga-de-alcatraz-1