add teca tutorial links to our RTD page

[burlen]

@taobrienlbl recorded the tutorial and itv can be linked as

<iframe id="kaltura_player" src="[https://cdnapisec.kaltura.com/p/1751071/sp/175107100/embedIframeJs/uiconf_id/26683571/partner_id/1751071?iframeembed=true&playerId=kaltura_player&entry_id=1_d8j71367&flashvars[streamerType]=auto&amp;flashvars[localizationCode]=en&amp;flashvars[sideBarContainer.plugin]=true&amp;flashvars[sideBarContainer.position]=left&amp;flashvars[sideBarContainer.clickToClose]=true&amp;flashvars[chapters.plugin]=true&amp;flashvars[chapters.layout]=vertical&amp;flashvars[chapters.thumbnailRotator]=false&amp;flashvars[streamSelector.plugin]=true&amp;flashvars[EmbedPlayer.SpinnerTarget]=videoHolder&amp;flashvars[dualScreen.plugin]=true&amp;flashvars[Kaltura.addCrossoriginToIframe]=true&amp;&wid=1_cqgz80sn](https://cdnapisec.kaltura.com/p/1751071/sp/175107100/embedIframeJs/uiconf_id/26683571/partner_id/1751071?iframeembed=true&playerId=kaltura_player&entry_id=1_d8j71367&flashvars[streamerType]=auto&flashvars[localizationCode]=en&flashvars[sideBarContainer.plugin]=true&flashvars[sideBarContainer.position]=left&flashvars[sideBarContainer.clickToClose]=true&flashvars[chapters.plugin]=true&flashvars[chapters.layout]=vertical&flashvars[chapters.thumbnailRotator]=false&flashvars[streamSelector.plugin]=true&flashvars[EmbedPlayer.SpinnerTarget]=videoHolder&flashvars[dualScreen.plugin]=true&flashvars[Kaltura.addCrossoriginToIframe]=true&&wid=1_cqgz80sn)" width="400" height="285" allowfullscreen webkitallowfullscreen mozAllowFullScreen allow="autoplay *; fullscreen *; encrypted-media *" sandbox="allow-downloads allow-forms allow-same-origin allow-scripts allow-top-navigation allow-pointer-lock allow-popups allow-modals allow-orientation-lock allow-popups-to-escape-sandbox allow-presentation allow-top-navigation-by-user-activation" frameborder="0" title="NERSC TECA Tutorial - Session 1"></iframe>