Set wm class and name with -name
Add Vim modeline for dunstrc.

With this modeline, the dunstrc gets syntax highlighting in vim by
default.
Merge pull request #178 from Necoro/modeline

Add Vim modeline for dunstrc.
Merge pull request #167 from badosu/add-name-setting

Set wm class and name
Merge remote-tracking branch 'knobweb/master'
Small fix