Update

Increased execution speed
Update

Added additional error handling
Update

Corrected comments and simplified output argument handling
Update

Corrected improper scaling and offset of filtered data
Initial Version
Update

Added interpolation of CA10, CA50 and CA90 between samples
Modification

Added manual knock onset identification, changed output from CA to
sample index. Automatic mode is not capable of locating stat of knock
to +- 1CA accuracy typically.