Handle Network/Identity creation and removal

...n/java/de/kuschku/libquassel/quassel/syncables/Network.kt

...ava/de/kuschku/libquassel/quassel/syncables/RpcHandler.kt

...schku/libquassel/quassel/syncables/interfaces/INetwork.kt

lib/src/main/java/de/kuschku/libquassel/session/ISession.kt

lib/src/main/java/de/kuschku/libquassel/session/Session.kt

...main/java/de/kuschku/libquassel/session/SessionManager.kt

...ain/java/de/kuschku/libquassel/util/irc/IrcCaseMappers.kt

...ava/de/kuschku/quasseldroid/viewmodel/QuasselViewModel.kt

...e/kuschku/quasseldroid/viewmodel/data/AutoCompleteItem.kt

...ava/de/kuschku/quasseldroid/viewmodel/data/IrcUserItem.kt