Merge pull request #38 from wgerlach/master

perl module for access to MG-RAST API
Update plot_mg_pcoa.r

Fixed bug for using color matrix
Merge branch 'master' of github.com:MG-RAST/MG-RAST-Tools
added feature to automatically create a legend for auto-colored PCoAs
added feature to automatically create a legend for auto-colored PCoAs
debugging legend generation for auto-colors
debugging legend generation for auto-colors
debugging legend generation for auto-colors
Merge branch 'master' of github.com:MG-RAST/MG-RAST-Tools
use URI::Escape