Build triggering upon Merge Request

Hi,

First of all, thank you very much for your awesome work with GitLab :) !

I have a question, i was testing to use GitLab - CI, everything works pretty well except one thing.

When i open a merge request against my master from a feature branch, in the merge request it shows me the previous run that the runner did with the feature branch code base. What i was expecting is more like how Travis handles this, merging both and running CI against it than giving feedback.

Is this possible?