dplug v3.0.0, added Audio Unit support

[Guillaume Piolat via Digitalmars-d-announce]

Context: dplug is a library for creating native audio plugins as 
simply as possible. You can target Windows Vista+ and OS X 10.7+


Audio Unit format has been implemented as of dplug version 3.


Changelog:

   v3.x.y (09/05/2016):
     - Audio Unit compatibility added, with both Cocoa and Carbon 
UI. What is still missing from AU: Audio Component API, 
sandboxing, v3. In other words it's on parity with IPlug but not 
JUCE.
     - The release tool is now much more friendly to use.
     - Special keys in dub.json are now expected in a plugin.json 
file next to dub.json. In the future it will be the place of 
autority for information about a plugin, for now this has to be 
duplicated in buildPluginInfo() override. An empty plugin.json is 
OK, defaults are in place.
     - The Wiki became a place to visit.


See_also: https://github.com/p0nce/dplug for more information.