Update juce to ea6099d
Update BinaryData.cpp
Fix compile error with clang

When using clang, return value of ValueTree::getProperty could not
automnatically been casted to StringRef.
Update menu items after selecting exporter

On Mac the main menu was not updated after selecting a new exporter.
Force update by calling menuItemsChanged().
Move Mac specific code out of TestRunner to Application

Move code for hiding Mac Dock icon from TestRunner class to Application.