text: Title: Object has no attribute 'set_camera_orientation'
  Body: First off, I'm not sure whether this error is related more to Manim or Python so don't kill me for that. So I've tried to run this program from a YouTube video ([here it is](https://www.youtube.com/watch?v=oqDQwEvHGfE&ab_channel=Visualization101)), which is supposed to be an animation of the Lorenz Attractor.
  
  **Code**: 
  
  ```python
  from manimlib.imports import *
  
  class Lorenz_Attractor(ThreeDScene):
      def construct(self):
          axes = ThreeDAxes(x_min=-3.5,x_max=3.5,y_min=-3.5,y_max=3.5,z_min=0,z_max=6,axis_config={"include_tip": True,"include_ticks":True,"stroke_width":1})
          dot = Sphere(radius=0.05,fill_color=BLUE).move_to(0*RIGHT + 0.1*UP + 0.105*OUT)
          
          self.set_camera_orientation(phi=65 * DEGREES,theta=30*DEGREES,gamma = 90*DEGREES)  
          self.begin_ambient_camera_rotation(rate=0.05)            #Start move camera
  
          dtime = 0.01
          numsteps = 30
  
          self.add(axes,dot)
  
          def lorenz(x, y, z, s=10, r=28, b=2.667):
              x_dot = s*(y - x)
              y_dot = r*x - y - x*z
              z_dot = x*y - b*z
              return x_dot, y_dot, z_dot
  
          def update_trajectory(self, dt):
              new_point = dot.get_center()
              if get_norm(new_point - self.points[-1]) > 0.01:
                  self.add_smooth_curve_to(new_point)
  
          traj = VMobject()
          traj.start_new_path(dot.get_center())
          traj.set_stroke(BLUE, 1.5, opacity=0.8)
          traj.add_updater(update_trajectory)
          self.add(traj)
  
          def update_position(self,dt):
              x_dot, y_dot, z_dot = lorenz(dot.get_center()[0]*10, dot.get_center()[1]*10, dot.get_center()[2]*10)
              x = x_dot * dt/10
              y = y_dot * dt/10
              z = z_dot * dt/10
              self.shift(x/10*RIGHT + y/10*UP + z/10*OUT)
  
          dot.add_updater(update_position)
          self.wait(420)
  ```
  <!-- The code you run -->
  
  When I run this code, I get this:
  
  **Error**:
  ```
  Traceback (most recent call last):
    File "C:\Users\Azelide\manim\manim.py", line 5, in <module>
      manimlib.main()
    File "C:\Users\Azelide\manim\manimlib\__init__.py", line 12, in main
      scene.run()
    File "C:\Users\Azelide\manim\manimlib\scene\scene.py", line 76, in run
      self.construct()
    File "lorenztrick.py", line 8, in construct
      self.set_camera_orientation(phi=65 * DEGREES,theta=30*DEGREES,gamma = 90*DEGREES)
  AttributeError: 'Lorenz_Attractor' object has no attribute 'set_camera_orientation'
  ```
  This looks to me quite inexplicable, since ``` set_camera_orientation ``` does exist in the Manim library and I assume the code should work fine otherwise, you can see the video for the demonstration.
  
  Also, this is already a different issue but when I've tried running the 8 scenes from the example_scenes.py, they worked quite ok apart from the first scene (OpeningManimExample) giving me this traceback after I see the transformation of z to z^2:
  ```
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-79 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-114 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-116 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-104 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-105 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-110 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-107 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-103 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-111 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-102 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-101 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-112 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-108 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-97 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-115 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-44 not recognized
    warnings.warn(f"{ref} not recognized")
  C:\Users\Azelide\manim\manimlib\mobject\svg\svg_mobject.py:132: UserWarning: g1-109 not recognized
    warnings.warn(f"{ref} not recognized")
  
  ```
  
  I'm running on Python 3.9.1, Windows 10 64-bit, in virtualenv. I was getting exactly the same errors both when not running via virtualenv and running via virtualenv. Reinstalled everything a few times, routed everything necessary to PATH in environment variable settings, nothing has improved.
  