first commit
create model#user_session with specs
create model#omniauth_hash that converts a hash to user instance with specs
oauth signin fully working
create upload js view, router and templates
remove
Merge branch 'master' of https://github.com/rafaeljesus/desafio-programacao-1

* 'master' of https://github.com/rafaeljesus/desafio-programacao-1:
  Corrige typo
  Inclui arquivo de exemplo
  Cria instruções do desafio.
  Initial commit