Suppress browser caching to avoid "Where's my time?!" questions.

[jaxankey]

On the live timing / laps webpage, I would suggest including this in the header:

<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Expires" content="0">

as per the top solution here: https://stackoverflow.com/questions/49547/how-do-we-control-web-page-caching-across-all-browsers

I believe this will force browsers to reload the data and not use the cache, which will prevent confusion among participants. We have found that sometimes laps seem to "disappear" (but really they're just using an old version of the site), or we see different information on different devices, and switching to incognito seems to fix it.

Cheers! Jack