Redesign of between-block blending in deferredFragShader.glsl.
Optimization: Common initial setting of cTexel in
deferredFragShader.glsl.
Code seam removal in eferredFragShader.glsl.
Enabled code corner filtering in deferredFragShader.glsl
Added texture edge wrapping in deferredFragShader.glsl.
Bugfix: Inverse y(V) orientation.