Add glowing bear logo

Replace weechat logo with a bear that glows
Recalculate number of lines needed on resizing

The issue with #bufferlines on mobile has been fixed in 0d580cc, so calculate
the number of (non-wrapping) lines that fit in the window and add a buffer of 10
for hidden lines and to allow scrolling up to fetch more lines (#202)
Merge pull request #204 from lorenzhs/numlines

Recalculate number of lines needed on resizing
Merge pull request #196 from cormier/glowing-logo

Glowing logo
Add some padding around the logo

This looks nicer with the new "glowing bear"
Merge pull request #205 from tribut/patch-1

Add some padding around the logo
Larger icons
Merge pull request #208 from lorenzhs/largericons

Larger icons
Optionally play a sound on notification

Fixes #42
TODO: find and add a sound file
Move img directory to assets directory
Use "sonar" sound for notifications
Merge pull request #210 from cormier/add-assets

Add assets
Remove margin-right from #topbar.actions

If this is nonzero, content from div.title can overflow into the right margin of the buttons.
Fix bufferlist not working after reconnect
Tweak channel highlighting regex

Don't require white space at the start, punctuation marks are good, too.
Merge pull request #214 from torhve/fix-bufferlist

Fix bufferlist not working after reconnect

Fix #183
Open #73
Merge pull request #211 from tribut/patch-2

Remove margin-right from #topbar.actions
Merge pull request #215 from lorenzhs/patch-1

Tweak channel highlighting regex
Treat messages arriving in active buffer as unread if window is not focused
Reset unread count on disconnect