Updated Esenthel Source:
-added new "Texture Quality" property to Material Editor allowing to control quality of color texture
-memory containers and strings are now overflow-safe
-improved MeshBase.setAdjacencies, MeshBase.removeDoubleSideFaces (Object Editor "Delete double-side faces")
-added new material technique MTECH_LEAF_2D
-added a workaround for flickering on Nvidia GeForce

Fixes:
-fixed a bug in BC4S/5S encoder which resulted in lower compression quality/artifacts (this affects normal textures, for best quality it's recommended to reload material base textures)