Added nick list, optimized sorting behaviour

app/build.gradle

app/src/main/java/de/kuschku/libquassel/CoreConnection.java

app/src/main/java/de/kuschku/libquassel/client/Client.java

...n/java/de/kuschku/libquassel/ssl/QuasselTrustManager.java

...ava/de/kuschku/libquassel/syncables/SyncableRegistry.java

.../libquassel/syncables/serializers/CoreInfoSerializer.java

...u/libquassel/syncables/serializers/NetworkSerializer.java

...uschku/libquassel/syncables/types/abstracts/ANetwork.java

...ku/libquassel/syncables/types/impl/BufferViewManager.java

.../de/kuschku/libquassel/syncables/types/impl/CoreInfo.java

...e/kuschku/libquassel/syncables/types/impl/IrcChannel.java

...a/de/kuschku/libquassel/syncables/types/impl/IrcUser.java

...a/de/kuschku/libquassel/syncables/types/impl/Network.java

...schku/libquassel/syncables/types/interfaces/QNetwork.java

...kuschku/libquassel/syncables/types/invokers/INetwork.java

...java/de/kuschku/quasseldroid_ng/ui/chat/MainActivity.java

...uasseldroid_ng/ui/chat/dialogs/CoreInfoDialogBuilder.java

...asseldroid_ng/ui/chat/drawer/BufferViewConfigAdapter.java

...hku/quasseldroid_ng/ui/chat/nicklist/NickListAdapter.java

...sseldroid_ng/ui/coresettings/network/AllNetworksItem.java