add talk listing to home page

[wgao19]

Implements #41

cc @JennieJi @huijing

[thchia]

Sorry I anyhow press resolve conversation on the query discussion. But I think you could have just had two fields in the one query.

[wgao19]

Thanks for the work and suggestions! Here are some of my thoughts:

• is there any way to make the boxes take their own content height?

• on the widest screen, the part on the RHS feels a bit too much information stacked into one small region.. maybe can adjust a little bit, move something to other places, etc:
  

• on narrower screens, shall we put "on the next RK" before "past talks"?
  

[huijing]

Looks overly-long right now, but will scale well once you have more talks in the past talks section.

Changing the visual order will affect keyboard navigation, unless u are able to modify the markup at a different viewport size.

[wgao19]

it looks nicer than the last version 😃

peaking from afar, what do u think of moving stories to beneath the main section to make lengths match?
on the flip side, this main section is going to grow longer, so im fine w the current layout too

gonna take whatever ur call on this is, and thank you muchly for working on this again 🐳💜

[wgao19]

i really love how the main section flows the boxes btw, ur so great at this 🦔🦔🦔🦔

[huijing]

i think after 2 more meetups, the past talks content will become long-ish enough to even things out (so it will look nicer in 2 months?)
but is @JennieJi ideas v good :)
also u r director...haha...i'm just the guy who moves things around ¯\_(ツ)_/¯

[wgao19]

cool, let's merge this :) thank you all!

[wgao19]

Erm, so, girls, sorry that I then made a lot more changes than expected. Mainly because our changes to home page layout breaks other pages. And I've refactored and simplified our structure a little bit. Then some further changes incurred.

In summary:

• refactored the whole structure to have a default layout for all pages
• the default layout is a simple header - main + aside - footer
• added talk content by parsing GH issue body (my bad, I should have foreseen and done this before having you working on this)
• remove unused css and other minor refactors

I will merge this for now. A lot of my implementation is now pretty crude, but hopefully it's conceptually simpler for easier maintenance in the future. And we can pick up from there:

• bring back "submit talk" button on home page
• the home page now looks slightly clumpsy because there is a lot of content now, I think we can find ways to optimize this
• footer is very delicate now (i.e., in "story" page, if you add a border top to match the border bottom on header, you can see the width is broken)

[wgao19]

addresses #14 on talk parsing as wel