0025556: Visualization - support stereo pair formats recognized by consumer display devices

Graphic3d_StereoMode - add new enumeration for stereoscopic outputs:
- Graphic3d_StereoMode_QuadBuffer
- Graphic3d_StereoMode_Anaglyph
- Graphic3d_StereoMode_RowInterlaced
- Graphic3d_StereoMode_ColumnInterlaced
- Graphic3d_StereoMode_ChessBoard
- Graphic3d_StereoMode_SideBySide
- Graphic3d_StereoMode_OverUnder

Graphic3d_RenderingParams - add new options controlling stereo output:
- StereoMode
- ToReverseStereo
- AnaglyphFilter

OpenGl_ShaderManager - add predefined GLSL programs for new stereo outputs.
OpenGl_Workspace::Redraw() - do not implicitly disable stereo to allow stereo dump as is.
OpenGl_Caps - add flag swapInterval to control VSync.
OpenGl_Workspace::BufferDump() - handle cases with non-applicable GL_PACK_ROW_LENGTH.

CALL_DEF_WINDOW - drop unused fields; add fields "left" and "top"
to reverse stereo pair for interlaced output depending on window position.

Draw Harness, ViewerTest:
- Extend syntax of command vstereo to setup stereo.
- Extend vdump command to allow dump of stereoscopic pair in different formats.
- Extend command vcaps with option vsync.
- Use mouse scroll to zoom and adjust ZFocus in WinAPI.
- Use "/" and "*" to adjust IOD.

v3d/glsl/stereo - add test case for stereo modes.

Cocoa_LocalPool, OSD_EnvironmentIterator - fix compilation issues on OS X Snow Leopard.

tests/v3d/glsl/stereo

@@ -0,0 +1,33 @@
+puts "========"
+puts "Stereo output modes"
+puts "========"
+
+restore [locate_data_file occ/fuse.brep] f
+vinit View1
+vclear
+vsetdispmode 1
+vaxo
+vdisplay f
+vfit
+vrotate -0.5 0.0 0.0
+
+vstereo -mode anaglyph
+vfit
+vdump $::imagedir/${::casename}_anaglyph.png -stereo blend
+
+vstereo -mode columnInterlaced
+vdump $::imagedir/${::casename}_col.png -stereo blend
+
+vstereo -mode chessBoard
+vdump $::imagedir/${::casename}_chess.png -stereo blend
+
+vstereo -mode rowInterlaced
+vdump $::imagedir/${::casename}_row.png -stereo blend
+
+vstereo -mode sideBySide
+vdump $::imagedir/${::casename}_sbs_anamorph.png -stereo blend
+
+vstereo -mode overUnder
+vdump $::imagedir/${::casename}_overunder_anamorph.png -stereo blend
+
+vdump $::imagedir/${::casename}_sbs.png -stereo sbs