Initial commit.
Add backend.
Changed "unload" ajax request to async.
Fix for firefox.
Work in progress.
Fixed bug.

Position default should not be integer 0.
Fix merge conflicts.
Remove unnecessary code.
Removing cycling invocation of saveState() function.
Passing position as an integer.
Updated JavaScript comments in VideoStorage modle.
Proper start from server-stored position.
Improving Python code.
Add small improvement.