Merge pull request #3 from dahoo/master

Add autocompletion
Merge pull request #4 from ThorstenHi/master

Polygons, autocomplete and a dynamic link to iD
Autoselect first entry, add placeholder text
Correct typo
Select input on focus
Added possibility to define multi tags for one preset: e.g. ATM -> standalone ATM and indoor ATM -> amenity=atm;atm=yes