Merge pull request gravitystorm#2922 from matkoniecz/usecase

make USECASES more consistent

USECASES.md

@@ -12,13 +12,12 @@ As we are still experimenting with this way of design, this document is restrict
 | Long distance road trip planning | Motorways | City names | z6, z7 |
 
 This gives us the following features:
-* z5: Map subject: Country names, country borders. Map context: seas, oceans.
+* z5: Map subject: Country names, country borders, city names. Map context: seas, oceans.
 * z6: Map subject: Country names, country borders, province/state names and borders, motorways, city names. Map context: Seas, oceans, country borders, city names.
 * z7: Map subject: Province/state names and borders, city names, motorways. Map context: Seas, oceans, country names, country borders.
 
 Some features that we currently render for which we do not (yet) have a use case:
 * Province/state names and borders on z5
-* City names on z5
 * Roads on z5
 * National parks on z7
 * Railways on z7