add createImage, setImageURL
use screenshot for playlab apple-touch-icon
sharing changes: fix iPhone6+, change webapp to 2x3 aspect ratio
webapp mobile share is just the app, which runs automatically
Updated form definition.
Added survey form.
Change survey claiming to use email addres.
Merged
Updated survey form.
Updated countries field.
default stepSpeed to zero
More form updates.
Made yes/no questions radio buttons.
Don't remove required attribute from fields.
Merge pull request #866 from code-dot-org/webapp_image

add createImage, setImageURL, sharing changes for iPhone 6+ and webapp
Dropbox changes.
Merge branch 'staging' into test
add checkbox,radio,marshal native wrapper args
Removed name and email fields from form.
Removed name from form definition.