Show avatars in autocomplete and nicklist

...main/java/de/kuschku/quasseldroid/ui/chat/ChatActivity.kt

...n/java/de/kuschku/quasseldroid/ui/chat/ToolbarFragment.kt

...kuschku/quasseldroid/ui/chat/buffers/BufferListAdapter.kt

.../quasseldroid/ui/chat/buffers/BufferViewConfigFragment.kt

...kuschku/quasseldroid/ui/chat/input/AutoCompleteAdapter.kt

...main/java/de/kuschku/quasseldroid/ui/chat/input/Editor.kt

...e/kuschku/quasseldroid/ui/chat/messages/MessageAdapter.kt

...u/quasseldroid/ui/chat/messages/QuasselMessageRenderer.kt

.../de/kuschku/quasseldroid/ui/chat/nicks/NickListAdapter.kt

...de/kuschku/quasseldroid/ui/chat/nicks/NickListFragment.kt

app/src/main/res/layout/fragment_nick_list.xml

app/src/main/res/layout/widget_chatmessage_plain.xml

app/src/main/res/layout/widget_nick.xml

app/src/main/res/layout/widget_nick_away.xml

lib/src/main/java/de/kuschku/libquassel/protocol/Message.kt

lib/src/main/java/de/kuschku/libquassel/protocol/QTypes.kt

...ku/libquassel/protocol/message/ClientInitAckSerializer.kt

...schku/libquassel/protocol/message/ClientInitSerializer.kt

...src/main/java/de/kuschku/libquassel/quassel/BufferInfo.kt

.../main/java/de/kuschku/libquassel/quassel/LegacyFeature.kt