STY: Fix copyright notices for new pep8 version (1.5)
STY: space after #
STY: More comments
STY: Use `v not in container` instead of `not v in container`.
STY: Comments and `not in`
MAINT: removed unsued imports and typo in shebang.
STY: setup.py copyright.
Adding percent explained property to PCoA
Fixing PCoA bug on eigvals returned
Adding test case for eigvals bug
STY: remove ### comments ###
STY: Reformatting more comments
STY: final fixes
Adding ids to the PCoA results
Addressing comments
Merge pull request #244 from Jorge-C/pep8fixes

Pep8fixes
Solving merge conflicts
Returning also 0.0 eigvals
MAINT: Update required numpy version
TST: Also test numpy 1.7