Update to 2.0 rc1

[asturur]

• rc1
  • Remove node specific code #4470
  • Improved Canvas.dispose code to leak less memory #4471
  • Remove extra padding of cache when upper limited #4467
  • Solved 2 perfomances problems with textbox #4466 #4465
  • Added justify-left justify-right and justify-center #4437
  • Fix Group fromObject and subTargetCheck #4454
  • Fix regression on IMG from SVG #4450
  • Remove cache dimensions together with canvas #4453
  • Fixed some fuzzyness cases for cache #4452
  • Fixed resize filter for webgl #4426
  • Stop searching target during a mouse move with a transform #4442
  • safeguard shaders for non supported precisions #4433
  • fix insert and remove style for edge cases #4420
  • Fix object.move when in active selection #4394
  • Memoize calcTransformMatrix function #4418
  • Make _set flag object as dirty just when a real change happen #4415
  • Add browserShadowBlurConstant to adjust shadowBlur value #4413
  • Fix set element not clearing the cacheTexture. #4410
  • Multi selection key can be configured with an array of keys. #4363
  • fix fast type in text loosing some style. #4339
  • fixed division by zero with lockscaling flip.
  • added paintFirst ( paint-order with svg support ) #4303