Merge pull request bulletphysics#4252 from erwincoumans/master

manually copy data, to avoid possible memory leaks.
Thanks to Jason Peng and Gilbert Feng for the report and reproduction case.

Merge pull request bulletphysics#4251 from erwincoumans/master

remove 'override' since Bullet uses C++2003

Update VERSION

Merge pull request bulletphysics#4213 from bwrsandman/fix-uwp

UWP: Fix potentially uninitialized local pointer variable error

Merge pull request bulletphysics#4219 from erwincoumans/master

remove thread import, it is not needed and required C++11

Merge pull request bulletphysics#4048 from priority-kew/aliengo_reduc…

…ed_meshes

Import Aliengo URDF

Merge pull request bulletphysics#3834 from erwincoumans/master

bump up pybullet version (and c++ version) to 3.17/3.1.7

Merge pull request bulletphysics#3297 from erwincoumans/master

bump up PyBullet to 3.09

Merge pull request bulletphysics#3206 from erwincoumans/master

bump up version to 3.08

Merge pull request bulletphysics#3090 from ErikGartner/master

Revert 32277c