Revert "World: added a 90 degrees correction of the view to have the X-Y plane the ground instead of X-Z - having the Z for height is a good thing"

This reverts commit 8559cd540633e443a7f4a725d086372874ee400a.
Merge pull request #17 from gheja/webgl

Revert "World: added a 90 degrees correction of the view to have the X-Y...