Issue title: lockOrientation missing
 Issue body: as described here: https://developer.mozilla.org/en-US/docs/Web/API/Screen/lockOrientation#Browser_compatibility

and https://developer.mozilla.org/en-US/docs/Web/API/Screen/orientation

usage example:
http://stackoverflow.com/a/30222772/1644202


 Comments: 
 Comment 0: Seems like it falls under http://caniuse.com/#feat=screen-orientation The properties/methods you mention are presumably from an old version of the spec.
 Comment 1: Yeah, I've updated http://caniuse.com/#feat=screen-orientation a bit to clarify and made lockOrientation searches micheal57@example.org.

{'source': 'GithubIssues', 'repo_name_with_owner': 'Fyrd/caniuse', 'issue_id': 83266326, 'repo_stars': 5399.0}