Merge pull request #20 from mkaply/master

Don't show the plugin icon on the URL bar
Stab at fixing print icon #17, showprintbutton in chrome=webconverger
Stab at fixing #21
Closes #22
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/webcnoaddressbar.xul
	src/webconverger.js