Tilt option to tilt the camera (for planetarium domes)

merge -r 19528-HEAD (20156)
starting dome test period again :) (i.e. not over committing in the trunk)

Warp Mesh supported now.
CopyTexSubImage2D implemented now instead of CopyTexImage2D

Commit of recent trunk merge.

final adjusts before first patch for reviewing.
Now the code is the same as the one found in:

[#18462] Fisheye (Dome) and Spherical Panoramic mode in BGE
file: 090329_review.R1.patch

merge from trunk +

- Dome images > 180 optimized to use more of the tesselated mesh
- Bug fixed (scaled texture maps)
- clean up (no more OFFSET and WARPED mode)
- I guess it's ready for review

A small fix (specular problem strikes again)
and now WireFrame mode shows the background mesh in wireframe as well. It's useful for calibration I think.

merge with trunk (scons fix and others)
+
Spherical Panoramic (mode 3) working 100% for resolution bigger than 5.
Shadow problems fixed.
More cleanup in the code.

Dome and Panorama mode using the whole canvas as buffer size
- added ResBuffer option to reduce the size of the buffer
- changes in FlattenPanorama, I may revert this later

merge from trunk.
I'm not sure I'm doing things rightly here :)
I'm syncing it now to commit more dome code later

First commit of the dome code.

Three modes working:
Dome mode - 1 fisheye, 2 truncated, 3 panoramic

A brief explanation of the code pipeline:

BL_KetsjiEmbedStart.cpp or GPG_Application.cpp
-> KX_KetsjiEngine.cpp::InitDome()
-> KX_Dome.cpp::Constructor(initiallising class)
-> KX_Dome.cpp::CreateMesh()
-> Turn to Hemisphere (normalize the verts coordinates)
-> KX_Dome.cpp::FlattenDome()

Every frame:
-> KX_KetsjiEngine.cpp::RenderDome() [a copy of KX_KetsjiEngine.cpp::Render()]
-> KX_Dome.cpp::RenderDomeFrame() [a copy of KX_KetsjiEngine.cpp::RenderFrame()]
-> KX_Dome.cpp::BindImages()
-> KX_Dome.cpp::DrawDome()

ge_dome branch for dfelinto's dome support