Make links visible in docs

src/Hierarchy.elm

@@ -116,13 +116,15 @@ size =
     Size
 
 
-{-| [![Layered behavior](https://elm-visualization.netlify.com/LayeredTree/preview.png)](https://elm-visualization.netlify.com/LayeredTree/)
+{-| [![Layered behavior](https://deploy-preview-142--elm-visualization.netlify.app/LayeredTree/preview@2x.png)](https://deploy-preview-142--elm-visualization.netlify.app/LayeredTree/)
 
 Passing this option causes each "layer" (i.e. nodes in the tree that have the same number of ancestor nodes)
 to be layed out with the same y value. This makes the layers much more emphasized (if you are for instance
 visualizing the organization of an army unit, then this might neatly show the rank of each member) at the cost
 of needing more space.
 
+This only makes a difference if `nodeSize` returns different heights for different children.
+
 -}
 layered : Attribute a { b | layered : Supported }
 layered =
@@ -227,9 +229,9 @@ none =
     Batch []
 
 
-{-| [![Tidy Tree](https://elm-visualization.netlify.com/TidyTree/preview@2.png)](https://elm-visualization.netlify.com/TidyTree/)
+{-| Produces a tidy node-link diagram of a tree, based on a linear time algorithm by [van der Ploeg](https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=d45f66231e053590c64c9d901fb7b028dbc5c923).
 
-Produces a tidy node-link diagram of a tree, based on a linear time algorithm by [van der Ploeg](https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=d45f66231e053590c64c9d901fb7b028dbc5c923).
+[![Tidy Tree](https://deploy-preview-142--elm-visualization.netlify.app/TidyTree/preview@2x.png)](https://deploy-preview-142--elm-visualization.netlify.app/TidyTree/)
 
 -}
 tidy :
@@ -335,9 +337,9 @@ tidy attrs t =
             layout
 
 
-{-| [![Treemap](https://elm-visualization.netlify.com/Treemap/preview@2.png)](https://elm-visualization.netlify.com/Treemap/)
+{-| A treemap recursively subdivides area into rectangles according to each node’s associated value. This implementation supports an extensible tiling method.
 
-A treemap recursively subdivides area into rectangles according to each node’s associated value. This implementation supports an extensible tiling method.
+[![Treemap](https://deploy-preview-142--elm-visualization.netlify.app/Treemap/preview@2x.png)](https://deploy-preview-142--elm-visualization.netlify.app/Treemap/)
 
 -}
 treemap :
@@ -474,9 +476,9 @@ squarifyRatio =
     Hierarchy.Treemap.squarifyRatio
 
 
-{-| [![Treemap](https://elm-visualization.netlify.com/Sunburst/preview@2.png)](https://elm-visualization.netlify.com/Sunburst/)
+{-| The partition layout produces adjacency diagrams: a space-filling variant of a node-link tree diagram. Rather than drawing a link between parent and child in the hierarchy, nodes are drawn as solid areas (either arcs or rectangles), and their placement relative to other nodes reveals their position in the hierarchy. The size of the nodes encodes a quantitative dimension that would be difficult to show in a node-link diagram.
 
-The partition layout produces adjacency diagrams: a space-filling variant of a node-link tree diagram. Rather than drawing a link between parent and child in the hierarchy, nodes are drawn as solid areas (either arcs or rectangles), and their placement relative to other nodes reveals their position in the hierarchy. The size of the nodes encodes a quantitative dimension that would be difficult to show in a node-link diagram.
+[![Sunburst diagram](https://deploy-preview-142--elm-visualization.netlify.app/Sunburst/preview@2x.png)](https://deploy-preview-142--elm-visualization.netlify.app/Sunburst/)
 
 -}
 partition :