Better headers in readme

Author: Chris Dawson

chapter-7-android-and-git-data/README.md

@@ -1,3 +1,5 @@
+## Building the app
+
 First, download the Android SDK and make sure you have Java installed.
 
 To build a debug app, use this command:
@@ -8,6 +10,8 @@ ANDROID_HOME=~/Android/Sdk \
 ./gradlew assembleDebug
 ```
 
+## Running Unit Tests
+
 To run the unit tests, use a GitHub account which:
 
 * does not have 2-factor auth enabled.
@@ -26,6 +30,8 @@ ANDROID_HOME=~/Android/Sdk \
 This single test proves that our GitHub client Java code makes a new file inside the Jekyll repository
 and then views the published post.
 
+## Running Espresso Tests
+
 To run the espresso test, you will need to create a `secrets.xml` file inside `app/src/main/res/values`.
 This file should contain the same username and password and look like this: