bump version to 68

Change-Id: Ia6605fac7844bfad8f114e4acef0dd7c7bfcb9ee

ring-android/app/src/main/AndroidManifest.xml

@@ -20,8 +20,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="cx.ring"
     android:installLocation="auto"
-    android:versionCode="67"
-    android:versionName="20170223">
+    android:versionCode="68"
+    android:versionName="20170301">
 
     <supports-screens
         android:anyDensity="true"