Updated Esenthel Source:
-fixed a bug when using Animation Editor Option \ Transform Original Object generated slots could've been scaled or non-orthogonal if animation featured non-uniform scaling
-other minor fixes
-updated Engine License by relaxing some limitations and clarifying some things

Updated Esenthel Source:
-optimized 'SlideMovement' functions
-added new 'SlideMovement' function allowing to move a circle in desired direction while preventing it from colliding with specified geometry

Fixes:
-copying meshes into other objects in the editor will now always perform correct mesh transformations