added filled shapes for pcoa plot
add analysisset pco function
Merge pull request #44 from teharrison/master

pco updates
add plot function to plant class for manhattan plot, wrap up calls to get variations in __init__
updated plant plot
Merge pull request #45 from teharrison/master

add plot function to plant class for manhattan plot, wrap up calls to get variations in __init__
more doc test and function lists
Merge pull request #46 from teharrison/master

more doc text and function lists
added wrapper function for caching plant data
doc text
minor tweak on plant, works with no id
Merge pull request #47 from teharrison/master

plant stuff
fix plant error
Merge pull request #48 from teharrison/master

bug fix