Reduce chance of incomplete MathJax rendering

This build is based on
579547d.

This commit was created by the following Travis CI build and job:
https://travis-ci.com/manubot/rootstock/builds/121884516
https://travis-ci.com/manubot/rootstock/jobs/222296602

[ci skip]

The full commit message that triggered this build is copied below:

Reduce chance of incomplete MathJax rendering

Merges #255
Closes #252

Disable MathJax fast preview to reduce render time.

Enable MANUBOT_ATHENAPDF_DELAY environment variable to set
the athenapdf --delay option.

Default to --delay=5000 (5 seconds) for CI builds, where ensuring
rendering is complete is crucial and Travis instances may have high load.
Default to  --delay=1100 (1.1 seconds) for local builds, where there is
a greater chance that users are running the command in real-time.

README.md

@@ -1,7 +1,7 @@
 # Output directory containing the formatted manuscript
 
 The [`gh-pages`](https://github.com/manubot/rootstock/tree/gh-pages) branch hosts the contents of this directory at https://manubot.github.io/rootstock/.
-The permalink for this webpage version is https://manubot.github.io/rootstock/v/3defccfbea9d088f3b6885e1bf18158c6a05f467/.
+The permalink for this webpage version is https://manubot.github.io/rootstock/v/579547d8140dd01ddf652dfd4dbeb6c4a2c4b0eb/.
 To redirect to the permalink for the latest manuscript version at anytime, use the link https://manubot.github.io/rootstock/v/freeze/.
 
 ## Files
@@ -36,4 +36,4 @@ Verifying timestamps with the `ots verify` command requires running a local bitc
 ## Source
 
 The manuscripts in this directory were built from
-[`3defccfbea9d088f3b6885e1bf18158c6a05f467`](https://github.com/manubot/rootstock/commit/3defccfbea9d088f3b6885e1bf18158c6a05f467).
+[`579547d8140dd01ddf652dfd4dbeb6c4a2c4b0eb`](https://github.com/manubot/rootstock/commit/579547d8140dd01ddf652dfd4dbeb6c4a2c4b0eb).

index.html

@@ -6,7 +6,7 @@
  <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
  <meta name="author" content="John Doe" />
  <meta name="author" content="Jane Roe" />
- <meta name="dcterms.date" content="2019-08-02" />
+ <meta name="dcterms.date" content="2019-08-04" />
  <meta name="keywords" content="markdown, publishing, manubot" />
  <title>Manuscript Title</title>
  <style>
@@ -86,7 +86,7 @@
 <header id="title-block-header">
 <h1 class="title">Manuscript Title</h1>
 </header>
-<p><small><em> This manuscript (<a href="https://manubot.github.io/rootstock/v/3defccfbea9d088f3b6885e1bf18158c6a05f467/">permalink</a>) was automatically generated from <a href="https://github.com/manubot/rootstock/tree/3defccfbea9d088f3b6885e1bf18158c6a05f467">manubot/rootstock@3defccf</a> on August 2, 2019. </em></small></p>
+<p><small><em> This manuscript (<a href="https://manubot.github.io/rootstock/v/579547d8140dd01ddf652dfd4dbeb6c4a2c4b0eb/">permalink</a>) was automatically generated from <a href="https://github.com/manubot/rootstock/tree/579547d8140dd01ddf652dfd4dbeb6c4a2c4b0eb">manubot/rootstock@579547d</a> on August 4, 2019. </em></small></p>
 <h2 id="authors">Authors</h2>
 <ul>
 <li><p><strong>John Doe</strong><br> <img src="images/orcid.svg" alt="ORCID icon" class="inline_icon" /> <a href="https://orcid.org/XXXX-XXXX-XXXX-XXXX">XXXX-XXXX-XXXX-XXXX</a> · <img src="images/github.svg" alt="GitHub icon" class="inline_icon" /> <a href="https://github.com/johndoe">johndoe</a> · <img src="images/twitter.svg" alt="Twitter icon" class="inline_icon" /> <a href="https://twitter.com/johndoe">johndoe</a><br> <small> Department of Something, University of Whatever · Funded by Grant XXXXXXXX </small></p></li>
@@ -4061,7 +4061,8 @@ <h2 id="references" class="page_break_before">References</h2>
  MathJax.Hub.Config({
  "CommonHTML": { linebreaks: { automatic: true } },
  "HTML-CSS": { linebreaks: { automatic: true } },
- "SVG": { linebreaks: { automatic: true } }
+ "SVG": { linebreaks: { automatic: true } },
+ "fast-preview": { disabled: true }
  });
 </script>