small refactoring
Made screen vars of int
added draw call statistics
improved getProjectedPos

removed check for z >0
replaced sqrt(2)/2 by constant factor
Changes on depthList creation

performance changes by filtering more blocks: CPU work:+, graphics
work:-
less sorting
FPS:+- 0%
fixed: #121
javadoc fix
updated version string
added insertion sort for minimal faster sorting

because data almost presorted insertion sort a bit faster