Created the new effects for represent tweens and tracks
Added classes to create a tween by means of an animation effects.
Added TrackEffectExecutor.
Added class and processor to keep multiple effects tracks.
Added the necessary initializations for the new classes.
Added a test for Animation, TrackEffect and the AnimationsEffect
Now the TimedEffect has only a effect and not multiples.
Also done other minor changes.
Merge pull request #697 from gorco/TimelineEffects

Timeline of standard effects and animation effects.