Changed from pygal to matplotlib

PyGal plots couldn't be edited in Inkscape.
Add relative eigens to output, fix R 'q' points

Relative eigenvalues are much easier to interpret than the normal eigenvalues, so print those to pcoa-*.txt
Apparently R plots use 'q' as their points if useDingbats isn't set to false. This makes editing via Inkscape hard.
Fixed an issue with cluster translation

Moved a file, which caused labdsv's cluster numbering to take over AXIOME's translations.
Moved a file, caused make to want to remake pcoa

Fixed so make is now happy
QIIME >=1.5.0 made unscaled default PCoA

If QIIME is >=1.5.0, now force scaled and unscaled data to be generated for Unifrac PCoA plots via QIIME.