Fixes #67. Domain regex too lenient

Reject link matches when:
- No scheme was matched
- The TLD doesn't match any of the known TLDs

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
added favicon.png to images
Merge pull request #76 from lauradegroot/master

added favicon.png to images
remove the li of muted messages
change mute text, wait 2 seconds, remove li
set mute button text to muted for all chats matching mute fingerprint

keep the messages on screen to let amateur troll wisperers know if the
message is from a bro that's just having a bad day.