Merge pull request #547 from diizy/master

New FX Mixer: GUI improvements - better icons for send button, fade the ...
Update aeffectx.h
Remove comment
Merge pull request #550 from diizy/vsttest

Update aeffectx.h
Merge pull request #553 from diizy/master

Timeline: Change loop points into different graphics
Initial ping-pong loop implementation
Ping-pong loop implementation: done, starting on AFP changes...
Finish ping pong loop implementation in AFP
Merge pull request #557 from diizy/loops

SampleBuffer, AFP: implement ping-pong loop mode