added some readme lines

README.md

@@ -2,6 +2,21 @@
 
 ![Pebble Appstore Banner](./banner.png)
 
-A simple directions app for the now discontinued Pebble smartwatch. Users could select their method of transport
-and then speak their destination using Pebbles voice input apis. Then the app would use the Here directions api to
+A simple directions app for the Pebble smartwatch.
+Users can select their method of transport and then speak their destination using Rebbles voice input apis.
+Then the app uses the Here directions api to
 get a list of directions starting at the users current location.
+
+Sadly public transport is not working in certain locations.
+> This coverage currently includes, but is not limited to, the following: Paris, France (STIF); Berlin, Germany (VBB); full coverage Germany (Deutsche Bahn); and Helsinki, Finland (HSL).
+
+You can find it in the [Rebble Appstore](https://apps.rebble.io/en_US/application/576ee8e6ba2fe5a0c10000b9).
+
+## Building
+
+In addition to the Pebble SDK you need to include your own API-keys for Here and mapQuest.
+Therefore you need to include the file `src/js/apiKeys.js` with the following content:
+```
+module.exports.hereApiKey = 'YOUR HERE API KEY';
+module.exports.mapQuestKey = 'YOUR MAPQUEST API KEY';
+```

package.json

@@ -1,7 +1,7 @@
 {
   "name": "pebble-directions",
   "author": "Dyedgreen",
-  "version": "1.8.0",
+  "version": "1.9.0",
   "keywords": [
     "navigation",
     "maps",