Added SSL Handling

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

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

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

...e/kuschku/libquassel/events/CertificateAcceptedEvent.java

...de/kuschku/libquassel/events/UnknownCertificateEvent.java

...assel/functions/serializers/HeartbeatReplySerializer.java

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

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

...libquassel/localtypes/backlogmanagers/BacklogManager.java

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

.../libquassel/primitives/serializers/MessageSerializer.java

.../java/de/kuschku/libquassel/protocols/DatastreamPeer.java

...main/java/de/kuschku/libquassel/protocols/LegacyPeer.java

...in/java/de/kuschku/libquassel/ssl/CertificateManager.java

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

...e/kuschku/libquassel/ssl/UnknownCertificateException.java

...quassel/syncables/serializers/AliasManagerSerializer.java

...el/syncables/serializers/IgnoreListManagerSerializer.java

...uassel/syncables/serializers/NetworkConfigSerializer.java

...a/de/kuschku/libquassel/syncables/types/BufferSyncer.java