Merge branch 'devel' into 'beta'

.idea/misc.xml

app/build.gradle

app/src/main/AndroidManifest.xml

app/src/main/java/de/kleinhti/hgkapp/AboutActivity.java

app/src/main/java/de/kleinhti/hgkapp/FeedbackActivity.java

app/src/main/java/de/kleinhti/hgkapp/SettingsActivity.java

app/src/main/java/de/kleinhti/hgkapp/WebsiteActivity.java

...leinhti/hgkapp/hgktube/HGKTubeVideoVideoViewActivity.java

app/src/main/java/de/kleinhti/hgkapp/utils/Updater.java

...ain/res/layout-land/activity_hgktube_video_video_view.xml

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

...src/main/res/layout/activity_hgktube_video_video_view.xml

app/src/main/res/values-de-rDE/strings.xml

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

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