[#62668410]

* 62668410-pdf-png:
  Issue pull request for branch 62668410-pdf-png
  Support PDF images in PDF output, PNG otherwise
Bump version number
Add support for \\ in Markdown

The double backslash is essentially the LaTeX equivalent of an HTML
break tag, but it wasn't being passed through the pipeline properly
from Markdown.

[Delivers #62685096]
Issue pull request for branch doublebackslash-62685096

[Delivers #62685096](https://www.pivotaltracker.com/story/show/62685096)
[#62685096]

* doublebackslash-62685096:
  Issue pull request for branch doublebackslash-62685096
  Add support for \\ in Markdown
  Bump version number