[openstreetmap-website] Update to iD v1.8.0 (#1081)

[Tom Hughes]

Something doesn't seem to he working - a lot of image seem to be missing or something:

![screenshot from 2015-11-08 08-27-16](https://cloud.githubusercontent.com/assets/147741/11019495/b18618c8-85f2-11e5-879d-595cc5d87cb2.png)

As you can see there are no image in the tool palette at the end of the selected road, or again the road type in the top left.

There don't appear to be any resources failing to load though...

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/pull/1081#issuecomment-154789280
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