Provide real 'appname' when creating notifications on linux

[hoschi]

At the moment all notifications have appname 'notify-send' which should be something like 'yakyak' so this notification can handled in a sepecific way. My use case to give them a special color to separate them from e.g. HipChat.

[averissimo]

@hoschi can you figure out what arguments does function notify requires for this?

I believe the node module is node-notifier

And the code for notifications can be found at:

https://github.com/yakyak/yakyak/blob/master/src/ui/views/notifications.coffee

[averissimo]

solved with icon on #467 (already in 1.4.1)

in case options to hide icon, the notification says (via YakYak) after sender's name