fix macOS build (following Projucer changes made in Windows, which removed /Applications/JUCE/modules from its headers). move JUCE headers under source control, so that Windows and macOS can both build against same version of JUCE. remove AUv3 target (I think it's an iOS thing, so it will never work with this macOS fluidsynth dylib).

modules/juce_gui_extra/embedding/juce_AndroidViewComponent.h

@@ -0,0 +1,87 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2017 - ROLI Ltd.
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
+   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
+   27th April 2017).
+
+   End User License Agreement: www.juce.com/juce-5-licence
+   Privacy Policy: www.juce.com/juce-5-privacy-policy
+
+   Or: You may also use this code under the terms of the GPL v3 (see
+   www.gnu.org/licenses).
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+#if JUCE_ANDROID || DOXYGEN
+
+//==============================================================================
+/**
+    An Android-specific class that can create and embed a View inside itself.
+
+    To use it, create one of these, put it in place and make sure it's visible in a
+    window, then use setView() to assign a View to it. The view will then be
+    moved and resized to follow the movements of this component.
+
+    Of course, since the view is a native object, it'll obliterate any
+    juce components that may overlap this component, but that's life.
+
+    @tags{GUI}
+*/
+class JUCE_API  AndroidViewComponent   : public Component
+{
+public:
+    //==============================================================================
+    /** Create an initially-empty container. The optional flag should be left as
+        false in most of the cases. Currently it is only set to true as a workaround
+        for a web browser bug, where scrolling would be very slow and it would
+        randomly scroll in an opposite direction of scrolling.
+     */
+    AndroidViewComponent (bool embedAsSiblingRatherThanChild = false);
+
+    /** Destructor. */
+    ~AndroidViewComponent();
+
+    /** Assigns a View to this peer.
+
+        The view will be retained and released by this component for as long as
+        it is needed. To remove the current view, just call setView (nullptr).
+    */
+    void setView (void* uiView);
+
+    /** Returns the current View. */
+    void* getView() const;
+
+    /** Resizes this component to fit the view that it contains. */
+    void resizeToFitView();
+
+    //==============================================================================
+    /** @internal */
+    void paint (Graphics&) override;
+
+private:
+    class Pimpl;
+    std::unique_ptr<Pimpl> pimpl;
+
+    bool embedAsSiblingRatherThanChild;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AndroidViewComponent)
+};
+
+#endif
+
+} // namespace juce