player actions
optional test parameter on post url if testing.
not testing
plugged library browsing events, and player window events.
Split 'common/' into commit '379c1074056d0ec57f42278feddc01ea048afc7e'

git-subtree-dir: common
git-subtree-mainline: 2281f19fbae2dff2c4621dcda6f3dffd9f0b50ab
git-subtree-split: 379c1074056d0ec57f42278feddc01ea048afc7e
fixed polish strings