adding makefile for psth, updating includes paths for Juce

Source/Processors/ChannelMappingNode/Makefile

Source/Processors/EventDetector/Makefile

Source/Processors/EventNode/Makefile

Source/Processors/ExampleProcessor/Makefile

Source/Processors/FPGAOutput/Makefile

Source/Processors/FileReader/Makefile

Source/Processors/FilterNode/Makefile

Source/Processors/LfpDisplayNode/Makefile

Source/Processors/LfpTriggeredAverageNode/Makefile

Source/Processors/Merger/Makefile

Source/Processors/NetworkEvents/NetworkEvents.h

Source/Processors/PSTH/Makefile

Source/Processors/PSTH/PeriStimulusTimeHistogramNode.h

Source/Processors/PSTH/TrialCircularBuffer.h

Source/Processors/PSTH/tictoc.h

Source/Processors/PhaseDetector/Makefile

Source/Processors/PulsePalOutput/Makefile

Source/Processors/RecordControl/Makefile

Source/Processors/ResamplingNode/Makefile

Source/Processors/SignalGenerator/Makefile