Fixed a lot of bugs

app/build.gradle

app/proguard-rules.pro

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

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

...src/main/java/de/kuschku/libquassel/IProtocolHandler.java

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

...libquassel/functions/serializers/HeartbeatSerializer.java

...rc/main/java/de/kuschku/libquassel/localtypes/Buffer.java

.../java/de/kuschku/libquassel/localtypes/ChannelBuffer.java

...de/kuschku/libquassel/localtypes/NotificationManager.java

...in/java/de/kuschku/libquassel/localtypes/QueryBuffer.java

...n/java/de/kuschku/libquassel/localtypes/StatusBuffer.java

.../libquassel/localtypes/backlogmanagers/BacklogFilter.java

...ssel/localtypes/backlogmanagers/SimpleBacklogManager.java

app/src/main/java/de/kuschku/libquassel/message/Message.java

...ibquassel/objects/serializers/SessionStateSerializer.java

...ava/de/kuschku/libquassel/objects/types/SessionState.java

...va/de/kuschku/libquassel/primitives/types/BufferInfo.java

...sel/syncables/serializers/BufferViewConfigSerializer.java

.../kuschku/libquassel/syncables/types/BufferViewConfig.java