Merge pull request #37 from scolsen/master

Make structural updates to the API keys section of the README.

README.md

@@ -95,9 +95,13 @@ repository. Reference the [issue](https://github.com/google/ground-android/issue
 
 ### Add Google Maps API Key(s)
 
-Create google_maps_api.xml files in gnd/src/debug/res/values and
-gnd/src/release/res/values, replacing API_KEY with debug and release Google Maps
-API keys:
+If you do not have them, generate *release* and *debug* Google Maps API keys by
+following the instructions at:
+
+  https://developers.google.com/maps/documentation/android-api/signup.
+
+In `gnd/src/debug/res/values` and `gnd/src/release/res/values` create
+`google_maps_api.xml` with the following contents:
 
 ``` xml
 <resources>
@@ -106,16 +110,15 @@ API keys:
 </resources>
 ```
 
-You can generate new keys at:
-
-  https://developers.google.com/maps/documentation/android-api/signup.
+In `gnd/src/debug/res/values` replace `API_KEY` with your Google Maps debug API key. In `gnd/src/release/res/values` replace
+`API_KEY` with your Google Maps release API key.
 
-Be sure the SHA-1 certificate fingerprint described in the API key generation instructions is  
-registered with package name ```com.google.android.gnd``` in:
+Verify the SHA-1 certificate fingerprint described in the API key generation instructions is  
+registered with package name `com.google.android.gnd`. To check, visit
 
   https://console.cloud.google.com/apis/credentials
 
-You can find the SHA-1 of the debug key generated by Android Studio with:
+To view the SHA-1 of the debug key generated by Android Studio run:
 
 ```
 $ keytool -list -v -keystore "$HOME/.android/debug.keystore" \