ENH: read_newick
ENH: added sniffer, writer, and docs
Merge branch 'master' of https://github.com/biocore/scikit-bio

Conflicts:
	skbio/io/__init__.py
	skbio/io/_exception.py
updated TreeNode and deprecated to_newick, from_newick, from_file
TST: fixed python3 in test_newick.py
TST: py3 - this better work...
TST: py3 - float() argument must be a string or a number, not 'NoneType'
TST: python lambdas are unhelpful
MAINT: improved sniffer readability
MAINT: minor changes
MAINT/TST: fixed tests
DOC: added changelog
Merge pull request #664 from ebolyen/master

Add newick format