Make iD default editor

Make iD the default editor for all users that have not specified
a preferred editor, except fall back to P2 on IE.
Remove Donate Ad Banner
Compact user menu
Convert edit menus to bootstrap dropdown
Specify width and height for image

User-uploaded images don't get automatically scaled
like Gravatar images do.
Use user_thumbnail_tiny
Pare menu down to basics
Drop role and aria attributes
Consistent title case
Merge remote-tracking branch 'osmlab/user-display'
Merge remote-tracking branch 'osmlab/id-default'
Update to iD v1.1.5
Build an asset manifest for iD
Remove unnecessary z-index for sidebar headings
Rework piwik configuration
Add support triggering a piwik goal when a map layer is selected
Update to iD v1.1.6
Localisation updates from http://translatewiki.net.
Localisation updates from http://translatewiki.net.
Add data-editor to the main edit tab

This ensures that the if the user's default editor is remote edit
then it will be triggered without a page reload.