Update call_peak.py

Added get_binom_cutoff function
Added method and binomial options

method - can used Randomization or Binomial methods for determining height threshold
binomial - alpha value for determining height threshold with binomial distribution
Added get_binom_cutoff function 

Will calculate height threshold based on binomial distribution
Uncommented logging.captureWarnings()
added binomial method and implemented
Update peakfinder.py
Update call_peak.py
Cleaned up call_peak.py
Added method and binomial options
Merge pull request #17 from Jill-Moore/master

CLIPper w/ Binomial Distribution Method