DOC: general clean-up and proof-reading of documentation
ENH: renamed dm format to lsmat, fixes #707
ENH: updated ordres format name to ordination, fixes #709
DOC: updated docs to reflect format name changes
DOC/STY: fixed some sphinx issues and other suggestions based on comments from @ebolyen
STY: fixed length of section header lines
STY/DOC: cleaned up text, formatting
STY: fixed formatting issue
STY: pep8 fix
Merge branch 'master' of github.com:biocore/scikit-bio into issue-708
DOC: added note for clarity
DOC: fixed unclear statement
ENH/STY: a few changes based on suggestions from @jairideout
Merge pull request #710 from gregcaporaso/issue-708

doc clean-up and format name changes
Merge branch 'master' into issue-679

Conflicts:
	skbio/io/_exception.py