building: update instructions for AS 3.5

The building from source instructions were written around the time Android Studio (AS) was version 1.5. Since then, some prompts/options have been removed or moved around. Thus, users willing to build from source may get confused with the current instructions. Update the screenshots to show a more version of AS (3.5), and remove the steps that are not longer necessary.

content/page/building.md

@@ -8,8 +8,6 @@ title: Building the Source Code
 1\) Download and install [Android
 Studio](http://developer.android.com/sdk/index.html).
 
-2\) Open Android Studio and select **Check out project from Version
-Control**.
 
 ![](/img/building/01.png)
 
@@ -36,7 +34,7 @@ project.
 ![](/img/building/13.png)
 
 7\) When the build process finishes, click **Show in File Manager** to
-open the folder containing the APK file, **briar-android-debug.apk**.
+open the folder containing the APK file, **briar-android-official-debug.apk**.
 You can
 [sideload](http://www.digitalcitizen.life/how-sideload-apps-using-apk-files-android-devices)
 this file onto any Android device.
@@ -44,8 +42,8 @@ this file onto any Android device.
 ![](/img/building/11.png)
 
 8\) Briar is under constant development, so you should check for updates
-regularly. To get the latest version of the source code, click the
-**Update Project** on option the **VCS** menu.
+regularly. To get the latest version of the source code, select **VCS>Update
+Project**.
 
 ![](/img/building/09.png)