Snapchat has just confirmed its first acquisition, a big step for the Santa Monica, California-based startup. As part of its update yesterday, the company rolled out two major new features in its app: instant messaging and video calling. The video-calling feature is particularly impressive. It’s meant to enable quick conversations with someone who’s already engaging with you, with the expectation that a call might be as short as the video message you would have sent using older versions of the app.