eduardolundgren/senna — pull request #56 by FagnerMartinsBrack (2014-09-12 03:04:33+00:00)
Title: An error should be issued if a surface element does not have an id

It is a good practice to use classes to identify every element in the
page, even though it is supposed to exist only once.
Since senna requires an id for a surface instead of a class, it should
issue an error when a developer starts using senna without specifying
and id attribute.