L20n/Features/String keys

goal

enable hash keys to be strings.

example

<cityList {
  "New York": "Nowy Jork",
  "Vienna": "Wiedeń",
  "Abu Dhabi": "Abu Dabi",
 *other: "{{ cityName }}"
}>

that would allow a localizer to localize the city name if possible and fallback to the default name if not:

<userCity "Twoje miasto to {{ :cityList[cityName] }}">

status

• open, there seem to be little to no implications on the syntax, so we may want to enable it.
• gandalf - accepted
• pike, stas - ?