PKG: moved qseq parser to IO
Revert "PKG: moved qseq parser to IO"

This reverts commit e559b9febfd25835d09d8522019ceef8f2506b58.
Merge branch 'master' of https://github.com/biocore/scikit-bio into issue-682
Merge branch 'master' of https://github.com/biocore/scikit-bio into issue-682
ENH: added qseq to IO with tests
STY: fixed import order and error in event of None
ENH: minor fixes
STY: flake8
Merge branch 'master' of https://github.com/biocore/scikit-bio into issue-682
Found flake8, had to merge
Merge pull request #724 from ebolyen/issue-682

Issue 682: QSEQ added to IO
Merge branch 'master' into issue-681

Conflicts:
	skbio/io/__init__.py
fasta i/o now uses _get_nth_sequence in _base