Update community.lst

Added:
signal.art
signal.org
signalusers.org
whispersystems.org

community.lst

@@ -323,6 +323,9 @@ skyscanner.com
 slideshare.net
 soapui.org
 software.cisco.com
+signal.art
+signal.org
+signalusers.org
 soundcloud.com
 spotify.com
 streamable.com
@@ -373,6 +376,7 @@ windguru.cz
 wise.com
 wixmp.com
 youtube.com
+whispersystems.org
 wunderground.com
 www.analog.com
 www.hetzner.com
@@ -387,7 +391,6 @@ www.support.xerox.com
 www.youtube.com
 www.ti.com
 www.wikiart.org
-www.wunderground.com
 xhamster.com
 xhamsterlive.com
 znanija.com