add post(s) about origins

[danbjoseph]

once we have the news & updates section i think we should consider cross-posting (asking first) this MSF post: https://www.msf.org/mapswipe-app-lets-public-help-deliver-medical-care-most-vulnerable

Ivan Gayton has also written up the early history of MapSwipe

[kopitek8]

@danbjoseph

Since the news & updates section is now done, you can create a markdown file about this post to add it to the website. Please send us the files as per the format. Reiterating another issue about blogs for news & updates section: #139