DO NOT MERGE - CYB-110 Comments now persist through entire gallery

https://github.com/ets-berkeley-edu/datacultures/pull/76

Follow up from #76 

@NolanChan Please fix the issues mentioned in this PR and create your own PR + close this one.
@coyote Hey Craig, can you look at this? Can I keep both portions of the code? Or do I have to choose my piece vs. your piece on the merge conflict?