Proposal for implementing getParamValueByString (vst3)
Merge branch 'valByStr' into developMH

Conflicts:
	modules/juce_audio_plugin_client/VST3/juce_VST3_Wrapper.cpp
	modules/juce_audio_processors/processors/juce_AudioProcessor.cpp
	modules/juce_audio_processors/processors/juce_AudioProcessor.h