only build demos using extras if BUILD_EXTRAS is on


git-svn-id: http://bullet.googlecode.com/svn/trunk@2713 08e121b0-ae19-0410-a57b-3be3395fd4fd
fix 'unused' warning. Fixes Issue 770

git-svn-id: http://bullet.googlecode.com/svn/trunk@2714 08e121b0-ae19-0410-a57b-3be3395fd4fd
Avoid crash in btCompoundCompoundCollisionAlgorithm if there is no tree for one of the btCompoundShapes
Update the revision, to avoid clearing the child cache each frame


git-svn-id: http://bullet.googlecode.com/svn/trunk@2715 08e121b0-ae19-0410-a57b-3be3395fd4fd
fix 64bit iOS,see also Issue 739




git-svn-id: http://bullet.googlecode.com/svn/trunk@2716 08e121b0-ae19-0410-a57b-3be3395fd4fd
fix SIMD_2_PI macro, see Issue 773

git-svn-id: http://bullet.googlecode.com/svn/trunk@2717 08e121b0-ae19-0410-a57b-3be3395fd4fd
Fix convex cast normals for btScaledBvhTriangleShape: normals were already in world space
See Issue 371 THere seems to be some other issues, need to get a reproduction case.


git-svn-id: http://bullet.googlecode.com/svn/trunk@2718 08e121b0-ae19-0410-a57b-3be3395fd4fd
fix rotation correction in btFixedConstraint, see Issue 769

git-svn-id: http://bullet.googlecode.com/svn/trunk@2719 08e121b0-ae19-0410-a57b-3be3395fd4fd
Merge branch 'master' of github.com:vancegroup-mirrors/bullet-physics