Change the PCoA from cogent to skbio
Solving small PEP8 issue
Remove useless comments
Using skbio PCoA
Move misplaced alpha diversity tests

Unit tests for `single_file_cup` were in pycogent_backports tests instead of QIIME's alpha diversity tests. Also fixed issue where temporary files weren't being cleaned up.

Fixes #1488.
initial changes to add index page to workflow output
updated so index page isn't supported in iterative mode, will add this in later as it's more complicated and less common - still needs testing with alignment, tree building, and tax assignment
fixed line wrapping in index file.
Merge branch 'master' of github.com:qiime/qiime into pick_otu_index

merge
changed index htm string format.
Merge pull request #1517 from johnchase/pick_otu_index

Pick otu index
changed percent to actual percent and not decimal.
Merge pull request #1519 from johnchase/pick_otu_index

changed percent to actual percent and not decimal. #1518
make biom strings pep8-compatible, fix cogent import

Thanks @josenavas!
Merge pull request #1508 from ElBrogrammer/cuptest

Move misplaced alpha diversity tests
resolves #1526
consolidate printonly check for #1526
remove extra else
made more readable
Change organization name in README.md

Point to biocore instead of qiime.