add more to conclusion

[nickreich]

The conclusion feels cursory and brief. I suggest adding some content, to follow the following outline

• existing first two sentences: keep as overview/intro to discussion, maybe add citation to the "why hubs are important" AJPH paper to frame this in the context of collaborative hubs growing...
• new paragraph on how data standards and open-source software ecosystems can reduce duplicative efforts and support communities doing similar work
• new paragraph that summarizes the "findings" of the case study (using mostly text that is there already)
• closing paragraph that takes the current last sentence and expands a bit more, talks about ongoing development and again emphasizes the collaborative, open-source nature of the project.

[eahowerton]

@nickreich I've given this a shot, but it might be worth you reading through the new version before I close the issue (commit here)

[nickreich]

I think this looks good. thanks!