Refine message in README (#126)

Add more detail about the effort to apply Private Kit to COVID

README.md

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 # Private Kit<img align="left" src="./assets/ShieldKeyHold512x512.png" data-canonical-src="./assets/ShieldKeyHold512x512.png" width="40" height="40"/> ![Android and iOS build on MacOS](https://github.com/tripleblindmarket/private-kit/workflows/Android%20and%20iOS%20build%20on%20MacOS/badge.svg)
 
+Help us stop COVID-19.
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+We’re building the next generation of secure location logging to preserve privacy and #flattenthecurve
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+Location logs provide time-stamped records of where users have been, allowing them to share information with health officials accurately and quickly. This helps support contact tracing efforts to slow the spread of the virus.
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+What’s truly special about Private Kit, though, is its privacy protection. Data never leaves users’ devices without their password entry and explicit consent. The location log generated by Private Kit cannot be accessed from outside the user’s device, meaning data transfer occurs only if the user chooses to share it with the researcher.
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 <img align="right" src="./assets/PreviewUI.png" data-canonical-src="./assets/PreviewUI.png"/>
 
-PrivateKit MIT is a ‘privacy-first’ app that allows you to log your GPS trails on your own phone. The information is stored locally and never shared with anyone (not even with us or MIT) until you explicitly decide to manually export the data. The location log generated by Private Kit cannot be accessed from outside the user’s device. Location information can be imported and exported by the user and used in other projects and applications.
+Private Kit is a ‘privacy-first’ app that allows you to log your GPS trails on your own phone. The information is stored locally and never shared with anyone (not even with us or MIT) until you explicitly decide to manually export the data. The location log generated by Private Kit cannot be accessed from outside the user’s device. Location information can be imported and exported by the user and used in other projects and applications.
 
 Private Kit’s trail generator logs your device’s location once every five minutes and stores 28 days of data in under 100KB of space – less space than a single picture.  But what is truly exciting about Private Kit is its privacy protection.