Tracking issue for 0.2.0

[PieterPenninckx]

Version 0.2.0 can make some breaking changes, so this is a list of things I would like to change before version 0.2.0:

• [ ] Remove deprecated things
• [ ] Add support for lv2 (#43)
• [ ] Add support for alsa
• [ ] Remove default implementation for AudioWriter::number_of_channels
• [ ] Offline backend: support multiple midi inputs and outputs.
• [ ] Offline backend: use ContextualEventHandler instead of EventHandler
• [x] Offline backend: support stopping
• [ ] Remove support for VST 2.4
• [x] ~VST: use indexed events (more uniform)~
• [ ] Use a different mechanism for audio buffers
• [ ] ~Make the API around AudioChunk more clean.~
• [ ] Decide on the data type for sampling frequencies.
• [x] Change the CommonMidiPortMeta trait so that no memory allocation is (i.e. do not require to return a String).
• [ ] Make it possible to dynamically choose the name of the ~plugin~ application (e.g. if there are multiple instances). I.e.: the method name from CommonPluginMeta should not just return a slice.