Merge pull request #1 from pazaan/master

...roid/upload/nightscout/NightscoutUploadIntentService.java

...t/android/upload/nightscout/NightscoutUploadReceiver.java

...droid/upload/nightscout/serializer/EntriesSerializer.java

...cout/android/xdrip_plus/XDripPlusUploadIntentService.java

...ightscout/android/xdrip_plus/XDripPlusUploadReceiver.java

app/src/main/res/drawable/drawer_header.jpg

app/src/main/res/layout/activity_login.xml

app/src/main/res/layout/activity_main.xml

app/src/main/res/menu/menu_register_usb.xml

app/src/main/res/values/strings.xml

app/src/main/res/xml/preferences.xml

build.gradle

gradle/wrapper/gradle-wrapper.properties