Add name-suggestion-index sources
Add name autocomplete
Use .low-zoom class rather than hard-coding z16
Limit suggestions to three 'closest' matches
Add SuggestNames util
Add tests for suggestNames
Handle https wikipedia URLs
Merge pull request #1946 from clinty/master

Handle https wikipedia URLs
Fix sprite misalignment on save color icons, closes #1948

The colored icons in the sprite had a 5px offset from the left edge
rather than a 7px offset the rest of the icons use. I previously had to
bump the background-position to fix this.
Add footway=crossing preset (fixes #1947)
Merge pull request #1950 from systemed/name-suggest

Autocomplete on name=*