Add Auto Layout trace command
Merge pull request #40 from facebook/autolayout_trace

Add Auto Layout trace command
Removed spaces on an empty line.
Added cast to `id` to avoid problems with certain commands.
Add depth parameter to pviews
Cast things and use UIApplication to get the keyWindow
Merge pull request #42 from facebook/various_fixes

Cast things and use UIApplication to get the keyWindow
Merge pull request #41 from facebook/pviews_depth

Add depth parameter to pviews
Merged master into device
Improved indentation.
Merge pull request #36 from antons/device

Enabled visualize command to work on devices