Refactor JinglePlugin to correctly utilize the latest Smack/Jingle library
Description
The Smack/Jingle library changed significantly to support <content> correctly and then later to draw closer to the draft XEPs. Spark never really got refactored and tested after this, so the Jingle plugin hasn't been working.
The Smack/Jingle library changed significantly to support <content> correctly and then later to draw closer to the draft XEPs. Spark never really got refactored and tested after this, so the Jingle plugin hasn't been working.