Replace opacity key to alpha value in color key.
Fix expanded panels and size allocation
Fix RGBA issues for GTK3
Merge pull request #209 from rilian-la-te/fix_rgba_all

Fix rgba all
Merge pull request #211 from rilian-la-te/remove_opacity_key_gtk3

Remove opacity key gtk3
Merge pull request #212 from rilian-la-te/fix_expand

Fix expand
Merge remote-tracking branch 'upstream/master'

Conflicts:
	libmate-panel-applet/mate-panel-applet.c