argparse + optional dropping for 'N's
deleted unused lines, made n's lowercased, and fixed pep8 fomatting
Merge pull request #426 from ged-lab/fix/fastq-to-fasta_N

added dropping N counts #395
Merge branch 'fix/fastq-to-fasta_toscripts'

Conflicts:
	sandbox/fastq-to-fasta.py
Revert "Merge branch 'fix/fastq-to-fasta_toscripts'"

This reverts commit 58934fab7c6f989c8e0f58bbc51c6c782d102793, reversing
changes made to a99c777dbe863f0afae8aee927f208df0871b449.
include sweep-reads-buffered in docs
Merge pull request #433 from ged-lab/doc/sweep-reads-buffered

include sweep-reads-buffered in docs
Updated test files and test_scripts.py