Fix build.
tag autocomplete can filter keys by element type.
Merge pull request #413 from bdon/master

taginfo api
Merge branch 'master' of github.com:systemed/iD into tooltips
Higher-contrast shared vertices
Merge branch 'master' of github.com:systemed/iD
Fix removal of elements on undo. Fixes #410
Only update inspector tag list when necessary
Merge branch 'master' into tooltips
Rename tooltip to tail, use tail in modes.