added barchart generator stratify.py
added barchart generator stratify.py

wltrimbl/kmerspectrumanalyzer,wltrimbl/kmerspectrumanalyzer,MG-RAST/kmerspectrumanalyzer,wltrimbl/kmerspectrumanalyzer,MG-RAST/kmerspectrumanalyzer,MG-RAST/kmerspectrumanalyzer