* Only use -no-pdf for xelatex rendering
* Instead of tracking du and dv points on surface, track points off the surface in the normal direction
This means that surface shading will not necessarily work well for arbitrary transformations of the surface. But the existing solution was flimsy anyway, and caused annoying issues with singularity points.
* Have density of anchor points on arcs depend on arc length
* Allow for specifying true normals and orientation of Sphere
* Change miter threshold on stroke shader
* Add get_start_and_end to DashedLine
* Add min_total_width option to DecimalNumber
* Have BackgroundRectangle.set_style absorb (and ignore) added configuration
Note, this feels suboptimal
* Add LineBrace
* Update font_size adjustment in Tex
* Add scale_factor parameter to BulletedList.fade_all_but
* Minor import tweaks
* Add play_sound
* Small if -> elif update
* Always use Group for FadeTransform
* Use time_spanned_alpha in ChangingDecimal
* Change priority of number_config vs. self.decimal_number_config in NumberLine init
* Fix clock animation
* Allow sample_coords to be passed into VectorField
* Enable setting points to a null list, and adding one point at a time.
* Add refresh_locked_data
* Add presenter mode to scenes with -p option
* Allow for an embed by hitting e during interaction
* Add set_min_height, etc.
* Make sure null parametric curve has at least one point
* Account for edge case where \{ is used in Tex
* Allow for logging notes in wait calls, useful for presenter mode
* Simplify choose, and add gen_choose for fractional amounts
* Default to no top on axes
* Allow match_x, match_y, etc. to take in a point
* Allow wait calls to ignore presenter mode
* Just use math.combo, no caching with choose(n, r)
* Use generator instead of list in bezier
* Bubble init_colors should override
* Account for "px" values read in from an svg
* Stop displaying when writing is happening
* Update the way Bubble override SVG colors
