Merge branch 'update-how-it-works' into 'master'

Update introduction paragraph on How it works page

See merge request !124

content/page/how-it-works.md

@@ -6,10 +6,10 @@ title: How it works
 
 Briar is a messaging app designed for activists, journalists, and anyone
 else who needs a safe, easy and robust way to communicate. Unlike
-traditional messaging apps, Briar doesn't rely on a central server -
+traditional messaging apps, Briar doesn't rely on a central server –
 messages are synchronized directly between the users' devices. If the
-internet's down, Briar can sync via Bluetooth or Wi-Fi, keeping the
-information flowing in a crisis. If the internet's up, Briar can sync
+Internet's down, Briar can sync via Bluetooth, Wi-Fi or memory cards, keeping the
+information flowing in a crisis. If the Internet's up, Briar can sync
 via the Tor network, protecting users and their relationships from
 surveillance.