Merge pull request bulletphysics#2550 from xhan0619/master

Group deformable constraint solves by islands

Merge pull request bulletphysics#2034 from erwincoumans/master

Cleaning up the issue tracked with old/out-of-date/issues that haven't been addressed for too long.

Merge pull request bulletphysics#1349 from piluke/patch-1

Fix a shadow warning by renaming a parameter in btInfMaskConverter

Update PhysicsServerCommandProcessor.cpp

Merge pull request bulletphysics#932 from erwincoumans/master

minor fixes, report visual frame instead of inertial frame in visualShapeData

Merge pull request bulletphysics#835 from erwincoumans/master

don't use GL_LINEAR_MIPMAP_LINEAR for shadow maps, compile issue, VR tiny UI work-in-progress

Merge pull request bulletphysics#834 from erwincoumans/master

Add rudimentary 'saveWorld' command in shared memory API and pybullet…

Merge pull request bulletphysics#822 from erwincoumans/master

SharedMemory API: don't enable rolling friction by default for progra…

Merge pull request bulletphysics#557 from erwincoumans/master

add a Pendulum example that is also used as unit test.

Update README.md