Peaks fix#56

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cschol wants to merge 3 commits intoVCVRack:v0.6from

cschol:peaks-fix

Commits on Oct 11, 2018

Fix Peaks implementation, enable compilation on older compilers, show checkmark when Number Station Mark is active.
cschol
committed
Move static global objects into class.
cschol
committed
Remove unnecessary references to IOBuffer.
cschol
committed