Remove 'main' function from 'parsers.cc' so that linker does not get confused when linking it into a driver program.
Remove 'main' function from 'parsers.cc' so that linker does not get confused when linking it into a driver program.

ged-lab/khmer,F1000Research/khmer,F1000Research/khmer,Winterflower/khmer,kdmurray91/khmer,souravsingh/khmer,ged-lab/khmer,jas14/khmer,jas14/khmer,souravsingh/khmer,jas14/khmer,Winterflower/khmer,souravsingh/khmer,kdmurray91/khmer,kdmurray91/khmer,Winterflower/khmer,F1000Research/khmer,ged-lab/khmer