better handling of HTTPErrors

not sure if this is the proper way to do it - but its better than just dying completely :)

before, the code would stop unable to catch particular exceptions because it already had an HTTPError. with this now i can do (this is in my key model validation)

    begin
      result = api.APIKeyInfo()
    rescue EAAL::Exception.EveAPIException(220), EAAL::Exception.EveAPIException(222) => e
      pp e.inspect
      self.valid_key = false
      self.save(validate: false)
      return false
    end

and catch specific exceptions.