Cleaned up the ugly synth to use a lambda.
Fixed a bug where ControlRandom wasn't guaranteed to create values inside its range.
A few little cleanups to ControlSwitcherTestSynth.cpp
Added a switch to ControlStepper to control whether it steps back down or snaps.
-Fixed a bug in ControlAdder. Adding was skipped whenever an input had changed.
-Created ControlPrinter for debugging.
-Simplifications to ControlSwitcherTestSynth
Moved includes into Tonic.h so that synths don't need to worry about what to include.
Added a new sound to FilteredNoiseSynth