Move app/view.dart to rendering/sky_binding.dart since it's part of the RenderObject API, really (it knows about RenderView intimately).
The tests pass. I didn't check every last example.
R=abarth@chromium.org
Review URL: https://codereview.chromium.org/1183913006.
This is a completion of Eric's WIP patch:
https://codereview.chromium.org/1179663005/
Low level support for creating a paragraph that contains
runs of styled text. The styles may be nested.
The Paragraph and RenderParagraph classes have been
replaced by Inline and RenderInline. Styled text is defined
with a tree of InlineText and InlineStyle objects.
R=abarth@chromium.org
Review URL: https://codereview.chromium.org/1177833012.
