attempt to address 'pointer' cursor issue raised by Montana on twitter

This is an attempt to address the concern raised by @calcnerd256 on [twitter](https://twitter.com/calcnerd256/status/489842961287364608) regarding the 'pointer' cursor when js is disabled. 

This PR will make the cursor pointer only appear when js is enabled, but makes no attempt to display the content that would be revealed when clicked with js enabled. Perhaps this PR can generate some discussion about how best to reveal the talk descriptions when js is not enabled.