Updated and refactored code

...ervables/callbacks/wrappers/AdapterUICallbackWrapper.java

...bservables/callbacks/wrappers/ChildUICallbackWrapper.java

...ables/callbacks/wrappers/MultiElementCallbackWrapper.java

...bservables/callbacks/wrappers/MultiUICallbackWrapper.java

.../observables/callbacks/wrappers/MultiUIChildCallback.java

...vables/callbacks/wrappers/MultiUIChildParentCallback.java

...servables/callbacks/wrappers/ParentUICallbackWrapper.java

...va/de/kuschku/util/observables/lists/IObservableList.java

...til/observables/lists/ObservableComparableSortedList.java

...kuschku/util/observables/lists/ObservableElementList.java

...ava/de/kuschku/util/observables/lists/ObservableList.java

.../kuschku/util/observables/lists/ObservableSortedList.java

...selDroidNG/src/main/java/de/kuschku/util/ui/Bindable.java

.../src/main/java/de/kuschku/util/ui/CompatibilityUtils.java

...NG/src/main/java/de/kuschku/util/ui/DateFormatHelper.java

...ava/de/kuschku/util/ui/MaterialActionBarDrawerToggle.java

...oidNG/src/main/java/de/kuschku/util/ui/SpanFormatter.java

...elDroidNG/src/main/java/de/kuschku/util/ui/ThemeUtil.java

...de/kuschku/util/ui/parcelableUtil/QVariantParcelable.java

...chku/util/ui/parcelableUtil/StorageBackendParcelable.java