Remove extra comma from line ends in output of HGSC_sample_summary

Fix for piping to HGSC_filt_w_dotdots

Bugfix for sample_summary; coverage numerator/denominator not being printed with commas

Add limited support for more than 4 alleles in append_gtcounts

Update FILTERING_AND_FORMATTING.md

Add and update documentation, license, usage, and comments

Add little plugin called "HGSC_vcf2csv". Works best on stuff run through "HGSC_filt_w_dotdots".

Initial commit