Add minimum builds to mpl and pillow and target them for builds
Merge pull request #5 from blink1073/mpl-1-1-and-pillow

Add minimum builds to mpl and pillow and target them for builds
Add a build for six
Merge pull request #6 from blink1073/mpl-1-1-and-pillow

Add a build for six
Remove base six version builder
Merge pull request #7 from blink1073/add-six

Remove base six version builder
Install networkx 1.8
Merge pull request #8 from blink1073/networkx-min-install

Install networkx 1.8
Remove networkx min version