Branding, copyright, readme updates

.gitlab-ci.yml

README.md

app/build.gradle.kts

app/sampledata/messages.json

app/sampledata/recent_messages.json

app/src/debug/res/values-de/strings.xml

app/src/debug/res/values/colors.xml

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

app/src/main/AndroidManifest.xml

app/src/main/java/de/kuschku/quasseldroid/Keys.kt

app/src/main/java/de/kuschku/quasseldroid/Quasseldroid.kt

...n/java/de/kuschku/quasseldroid/QuasseldroidGlideModule.kt

...java/de/kuschku/quasseldroid/dagger/ActivityBaseModule.kt

...ain/java/de/kuschku/quasseldroid/dagger/ActivityModule.kt

...main/java/de/kuschku/quasseldroid/dagger/ActivityScope.kt

.../main/java/de/kuschku/quasseldroid/dagger/AppComponent.kt

...src/main/java/de/kuschku/quasseldroid/dagger/AppModule.kt

...ain/java/de/kuschku/quasseldroid/dagger/DatabaseModule.kt

...ain/java/de/kuschku/quasseldroid/dagger/SettingsModule.kt

...main/java/de/kuschku/quasseldroid/service/AsyncBackend.kt