Add a triangle FFT visualizer tweaked for mic input

examples/processing/triangle16_particle_fft_input/OPC.pde

...processing/triangle16_particle_fft_input/TriangleGrid.pde

...rticle_fft_input/data/083_trippy-ringysnarebeat-3bars.mp3

.../processing/triangle16_particle_fft_input/data/colors.png

...les/processing/triangle16_particle_fft_input/data/dot.png

...riangle16_particle_fft_input/data/sampleswap-license.html

...le16_particle_fft_input/triangle16_particle_fft_input.pde