fix a bad merge

Dependencies

• [2] 4NFSODHH Merge text0
• [3] 27GDAM5J correct various names in this and other pre-freewheeling forks
• [4] N2NUGNN4 include a brief reference enabling many useful apps
• [5] THJX6RCJ Merge text0
• [6] H7WUFI5V fix method name in documentation

Change contents

• edit in reference.md at line 67
  [3.2384]→[2.8:21](∅→∅)
  − <<<<<<< HEAD
• edit in reference.md at line 70
  [2.177]→[2.177:185](∅→∅),[2.185]→[3.35:267](∅→∅),[3.2384]→[3.35:267](∅→∅),[3.267]→[2.186:235](∅→∅)
  − =======

  − * `App.update(dt)` -- called after every call to `App.draw`. Make changes to

  − your app's variables here rather than in `App.draw`. Provides in `dt` the

  − time since the previous call to `App.update`, which can be useful for things

  − >>>>>>> e7085e1e17e84291ef4d990708790ca899fb5c3c
• edit in reference.md at line 81
  [3.3222]→[2.236:249](∅→∅)
  − <<<<<<< HEAD
• edit in reference.md at line 83
  [2.319]→[2.319:403](∅→∅),[2.403]→[3.268:337](∅→∅),[3.3298]→[3.268:337](∅→∅),[3.337]→[2.404:453](∅→∅)
  − =======

  − * `App.mousereleased(x,y, mouse_button)` -- called when you release a mouse

  − button. Provides the same arguments as `App.mousepressed()` above.

  − >>>>>>> e7085e1e17e84291ef4d990708790ca899fb5c3c
• edit in reference.md at line 106
  [3.4583]→[2.454:467](∅→∅)
  − <<<<<<< HEAD
• edit in reference.md at line 107
  [3.2498]→[2.469:469](∅→∅),[2.469]→[2.470:478](∅→∅),[2.478]→[3.18:91](∅→∅),[3.4583]→[3.18:91](∅→∅),[3.91]→[2.479:528](∅→∅)
  −

  − =======

  − * `App.keyreleased(key)` -- called when you press a key on the keyboard.

  − >>>>>>> e7085e1e17e84291ef4d990708790ca899fb5c3c