Google Drive XBlock - Fake PR for review purposes, do not merge!

@martynjames Created this PR for the review. 

Btw for the future, it's easier to create this when the first commit is empty. Also, if we want to review a series of PRs at once instead of individual PRs, it would be easier to merge the individual PRs in a branch which isn't master, and then create a PR from that branch into master when it's ready -- this way we don't need "fake" PRs at all, they represent the actual review workflow.
Unfortunately our requirement was to accept what Google generates - which includes the width. We accommodate this as best as we can which is to set the width to 100%; an things seem to work out well in that case.


> On Dec 8, 2014, at 4:32 PM, chrisndodge <notifications@github.com> wrote:
> 
> In google_drive/google_docs.py:
> 
> >          scope=Scope.settings,
> >          default=textwrap.dedent("""
> >              <iframe
> > -                src="https://docs.google.com/presentation/d/1B22AsMwG7jgE39vm1BuiJClir_JUz1q077cPEKJR2mI/embed?start=false&loop=false&delayms=3000"
> > +                src="https://docs.google.com/presentation/d/1x2ZuzqHsMoh1epK8VsGAlanSo7r9z55ualwQlj-ofBQ/embed?start=true&loop=true&delayms=10000"
> >                  frameborder="0"
> >                  width="960"
> >                  height="569"
> Is there a way to accomplish width/height in a way so that it is not hardcoded in the xBlock? I'd be concerned if the xblock viewport changes, we'd end up with scrollbars in the outer container. Does the width/height come as part of the embed code from Google?
> 
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