fix typo. #87
Merge pull request #88 from lanice/shadingIssues_87

Shading issues 87
Move hand up/down when moving the mouse while right ctrl key is pressed. #79

Keep the cursor at its current position while changing the hand height.
Please try around, check if the up/down moving speed is okay (it depends only on the y pixel difference).
use normal distribution for terrain height changes #57
Merge branch 'raiseYourHand_79' into terrainToParticles_57
terrain transformation with left Alt + mouse scroll #57