disable help text by default in AllBulletDemos (text slows down many graphics cards)

improve CollisionDemo.cpp, show multi-contact generation using perturbation
improve ColladaConverter: add hinge/point 2 point constraint conversion support, add btScaledTriangleMeshShape support
Fix Dynamica MayaPlygin: remove 'active' flag, it has to be replaced by mass=0 for active, mass<>0 for passive
Added missing projectfiles
Fixed single-shot contact generation. it is disabled by default to improve performance
Bugfixes for character controller, thanks to John McCutchan for reporting
Constraint solver: better default settings
btDefaultAllocator: aligned allocator uses non-aligned allocator (instead of directly malloc/free)
disable memalign by default, use Bullet's aligned allocator

Demos/HeightFieldFluidDemo/BulletHfFluid/btHfFluidBuoyantShapeCollisionAlgorithm.cpp

@@ -11,7 +11,7 @@
 #include "btHfFluid.h"
 
 btHfFluidBuoyantShapeCollisionAlgorithm::btHfFluidBuoyantShapeCollisionAlgorithm(const btCollisionAlgorithmConstructionInfo& ci,btCollisionObject* col0,btCollisionObject* col1,btSimplexSolverInterface* simplexSolver, btConvexPenetrationDepthSolver* pdSolver)
-: btCollisionAlgorithm(ci), m_convexConvexAlgorithm(NULL, ci, col0, col1, simplexSolver, pdSolver) 
+: btCollisionAlgorithm(ci), m_convexConvexAlgorithm(NULL, ci, col0, col1, simplexSolver, pdSolver,0,0) 
 {
 	m_collisionObject0 = col0;
 	m_collisionObject1 = col1;