smurf: Fixed apodization wave number index offset

The right side of the spectrum was being apodized using a wave number
index value that was off by one.
smurf: Reindent spectrum code
smurf: Reindent phase correction code
smurf: Normalize spectrum
smurf: Added Phase Correction Function double sided InterFeroGram INput Real (IFGINR) debug output
smurf: Add debug output
smurf: Cleanup array indexing
smurf: Cleanup fftw plan
smurf: Adjust debug output
smurf: Adjust debug output
smurf: Adjust debug output
smurf: Error check file writing and closures
smurf: Correct off-by-one ZPD index error causing attenuation at half nyquist
smurf: Cleaned up zero-padding