Fix typo: Perhapas --> Perhaps

Author: waldyrious

IDEAS.md

@@ -35,5 +35,5 @@ Issues
 -------
  * A lot of wasteful processing occurs due to using a normal Mesh + Geometry + ShaderMaterial. None of the built-in three.js lighting / normals / stuff works on it. Should explore BufferGeometry instead and save lots of wasteful processing.
  * Need to replace ArrowHead with ArrowHeads, it's too slow for massive vector fields
- * The Director's rollback generator mangles complicated set/animate combinations. Need to figure out a better way to do this. Perhapas just replying it in reverse at high speed is a better solution than the current one where it tries to do it everything at once.
+ * The Director's rollback generator mangles complicated set/animate combinations. Need to figure out a better way to do this. Perhaps just replying it in reverse at high speed is a better solution than the current one where it tries to do it everything at once.
  * The current approach of on-demand allocation tends to create hiccups if a lot of objects are added simultaneously. This can be hidden by waiting e.g. 100ms before moving anything and should ideally be done for you.