Engine: * Rewrote stereo rendering * Simplified anaglyph rendering (no longer requires framebuffers) * Added stereo mode selection: Anaglyph (different combinations of red, green, blue and cyan), side-by-side (horizontal and vertical) and alternate frame rendering (AFR)

[patterns]
**.h = native
**.c = native
**.cpp = native
**.lua = native
**.txt = native
**.pas = native
**.inc = native