removed duplicated requests, and missing request (jquery-ui) in application.js
fixed post beeing cretead twice, and after created a new post, prepend the created post
pagination changed to the endeless page effect, now it's just scroll down to see the new posts
Merge pull request #19 from sapienza/master

Commits para: remover erros do application.js; corrigir novo post sendo criado duas vezes; implementação da paginação com o efeito endless page (basta scrollar para baixo para carregar novos posts)