Ref/intro apps

[lheagy]

First impressions

• add the case history image to the index page

Apps

• more description on how to get up and running with Binder, Azure

General cleanup

• update copyright year to 2018
• bibtex cleanup
• add live links that are slow to resolve to the linkcheck ignore

[lheagy]

before merging

• [x] coda patch
• [x] release notes

[lheagy]

Thanks @sgkang!