fix scale tween tests
fix xscale tween tests
fix rotate tween tests
fix rotate-to-path tween test
fix alpha tween test
fix easing tests, p1
fix easing tests, p2
fixing modifiers tests, p1
fixing modifiers tests, p2
fixing modifiers tests, p3
remove overlapping from tweens tests
fix syntax error in modifiers tests file
correct modifiers call logic and fix some of modifiers tests
fix modifiers tests to check 0 and 1 with approx. equality
fix tweens tests for scale, xscale and alpha tweens to use multiplied value, not sum
fix all builder tests (fix comparisons for tweens)
some docs on new changes
remove logs
Merge pull request #66 from Animatron/revert-time-logic-back-for-modifiers-and-tweens

Revert time logic back for modifiers and tweens
new frame-generator implementation that spawns a new instance for every call and controls them with id-s