new methods for vectors

• Vector class:
  • Replace isOrigin() method by isEqualTo(scalar) method
  • Fix Vector opposite method
• Vector2 class:
  • Constructor now accept numbers, array or Vector2 as parameters
  • set() method now accept numbers, array or Vector2 as parameters
  • Delete copy() and setFromAngle() methods
  • Add setFromRadian(), setFromDegree, setMinAxis(), setMaxAxis() methods
  • opposite() and absolute() methods now accept an axis name as parameter to set only this axis.
• Vector3 class:
  • Constructor now accept numbers, array or Vector3 as parameters
  • set() method now accept numbers, array or Vector3 as parameters
  • Delete copy() method
• Circle class:
  • First parameter of set() method and constructor is now Radius.
  • Position parameters of constructor can be given as numbers, array, angle or Vector2
  • Delete set(), setPositionXY() and setPositionFromVector() methods
  • Add setPosition(), setRadius() and setDiameter() methods
• Rectangle class:
  • First parameters of constructor are now width and height.
  • Position parameters constructor can be given as numbers, array, angle or Vector2
  • setPosition() method now accept numbers, array, angle or Vector2
  • setSize() method now accept numbers, array, angle or Vector2
  • delete setPositionXY(), setPositionX(), setPositionFromVector() and setPositionY() methods
  • delete set(), setSizeXY(), setSizeX(), setSizeFromVector() and setSizeY() methods