Hi there, it has been a while, just curious if my SVN account still works :)
This commit is an attempt to improve collisions between moving Bullet rigid bodies using (concave) triangle mesh bounds.
Instead of using Gimpact, this we create a btCompoundShape with child shape tetrahedra derived from the surface triangles.
For each triangle, we add a fourth vertex using the centroid, shifting inwards using the triangle normal.
If the centroid hits an internal triangle, we stop. The default depth could be exposed as 'advanced' setting in the user interface.
This solution will be a slower than the original/gimpact solution, but a bit more reliable.
In the future, it is better to add HACD, convex decomposition to Blender, for moving concave meshes.
See http://kmamou.blogspot.com and the Bullet SDK's Demos/ConvexDecompositionDemo.

Peer pressure :) Fix some very public (but probably harmless) errors in extern/bullet2, it will propagate to the Bullet soon from here:
https://www.assembla.com/code/bullet3/subversion/nodes
Thanks to Campbell for letting me know
Fixed described by Sean here:
http://stackoverflow.com/questions/818535/how-can-i-set-all-bits-to-1-in-a-binary-number-of-an-unknown-size

Bugfix for #26795 and #26917, Fix a bug that cause the radar sensor to break
Never memset(&ob, 0,sizeof(class)) when there is a constructor, it overrides all memory.
The problem was that the memset(0) was setting the scaling to (0,0,0), the height of the cone became 'infinity'
so GJK would iterate 'MAX_ITER' without converging due to this #NAN value

fixes in Bullet stuff, roll influence for raycast vehicles was broken,
enable the setPhysicsTicRate for BGE Python

apply patch for body suspend/resume
See also issue #26614
http://projects.blender.org/tracker/index.php?func=detail&aid=26614&group_id=9&atid=306

remove constructors, they cause compile errors under Fedora

BGE PhysicsConstraints.exportBulletFile improvement: also export the object names to .bullet files.

update Bullet physics sdk to latest trunk/version 2.78
add PhysicsConstraints.exportBulletFile(char* fileName) python command
I'll be checking the bf-committers mailing list, in case this commit broke stuff
scons needs to be updated, I'll do that in a second.

Replace the >>why is this here?? comment by some hard-earned experience with the .bullet file format (derived from .blend)

undo previous cmake fixes, Benoit already fixed it in cmake/macros.cmake