Merge pull request #1 from wil-langford/project_layout_on_disk

project_layout_on_disk
Merge branches 'hoppers' and 'master' of https://github.com/wil-langford/FishFace2 into hoppers
Fix a bug in the resize hopper which flipped the aspect ratio.
Add a test for ImageSource and one for HopperChain.
HopperChain and ImageSource are passing one very basic test each.