Ignore nicklist updates for buffers without a nicklist
Don't update read marker if no more lines could be fetched

Fixes disappearing read marker (set to -1)
Don't irc linky #foo after forward / backward slashes

This broke some URLs like http://caniuse.com/#feat=flexbox
Use svg logo on landing page
Merge pull request #229 from lorenzhs/titlepage

Use svg logo on landing page
Merge pull request #232 from lorenzhs/fixreadmarker

Fix disappearing read marker if no more lines could be fetched
Merge pull request #231 from lorenzhs/nicklistupdates

Ignore nicklist updates for buffers without a nicklist
Merge pull request #230 from lorenzhs/fixirclinky

Don't irc linky #foo after forward / backward slashes