* New scenes to April 20
 * Tweak to the Secret Santa/broke scene, to indicate some students do opt
   out of the Santa experience.
 * 'an echo' on March 30 Ellen scene.
 * Now directly track whether you chose the week6 advance. This will also
   be set on April 5th if you've got allowance debt; if you have a pre-0.7.15
   save that was made after the April 5th allowance, you won't get the
   "Including, to my surprise" line and will just get "my allowance arrives
   as usual."
 * Now correctly track whether we received our first post-debt allowance in
   week32. Saves made after the April 12th allowance in versions <0.7.17 will
   just get vanilla allowance text instead of excited allowance text.
 * Fixed a crash if you fast-forward through the week32 Musette portal scene.
 * Scrubbers for the Musette anim controllers added.
 * Level repr now shows subticks.
 * Casting spells on yourself now interrupts a dungeon pause even when there's
   a custom anim. Fixes the bug where casting Longjmp would tell you you cast
   Longjump, but then wait until you clicked before actually jumping.
 * Directional spells with custom anims (Lightning) no longer wait for a
   click to advance. (It does still wait for red casting to finish.)
 * Lightning graphic tweaked, now blue instead of purple/yellow.
 * Stairs no longer singular. Non-singular objects now crumble into rubble
   instead of crumbles-ing into rubble.
 * DefeatedFaders no longer physical, so they won't get pushed around by
   Shockwave.
 * Direction-chooser menu (as seen in Dig/Lightning) improved.
 * Fiddling with tinting code for side-view mossy walls.
 * One of Luke's uniform2 sprites was using the uniform1 base, fixed.
 * Removed unused cgs/body-tan.png.
 * Fixed a crash that can occur in certain talker errors.
 * Improved error reporting for some parse errors on saves/persistent.