fixed some synth issues, improved synthis, more parameters
tetra: added fm, so metallic and frequency sweeping pulses can be created
pentagon: fixed Dc, added fade between snare/clap/kick, snare can be manipulated to sound like toms
angular: added some control over echos-> length and modulation
decimate: some init parameters fixed

overall loudness modified
Merge branch 'master' of https://github.com/lodsb/UltraCom

Conflicts:
	examples/TreeQuencer/nodes/decimate.scala
	examples/TreeQuencer/nodes/iconosphere.scala
	examples/TreeQuencer/nodes/tetrahedron.scala
	examples/TreeQuencer/src/main/scala/TreeQuencer/NodeScene.scala
synth tweaks