Action: RepeatForever: behavior with "...To" and "...By' actions.

[aismann]

Source example:

    auto array = PointArray::create(20);

    array->addControlPoint(Vec2(0.0f, 0.0f));
    array->addControlPoint(Vec2(80.0f, 80.0f));
    array->addControlPoint(Vec2(s.width - 80, 80.0f));
    array->addControlPoint(Vec2(s.width - 80, s.height - 80));
    array->addControlPoint(Vec2(80.0f, s.height - 80.0f));
    array->addControlPoint(Vec2(80.0f, 80.0f));
    array->addControlPoint(Vec2(s.width / 2, s.height / 2));

    auto action  = CatmullRomBy::create(3, array);
    auto seq = RepeatForever::create(action);

    _tamara->runAction(seq);

Wrong behavior: see clip:

RepeatForeverBug.mp4

Fix:

RevertForeverBug1.mp4

[aismann]

I close it and remove the tags and add 'documentation'?
Reason:
After some more test I think RepeatForever works correct:

Using CatmullRomTo reapeat on the "start point"
Using CatmullRomBy reapeat on the "end point"

Same behavior for all "...To" and "...By".