Update OpenTK reference.

git-svn-id: http://bulletsharp.googlecode.com/svn/trunk@579 030a5c38-1ffe-11df-902a-156ec2e33ad3
Support 4-vertex faces in Wavefront obj files.

git-svn-id: http://bulletsharp.googlecode.com/svn/trunk@580 030a5c38-1ffe-11df-902a-156ec2e33ad3
Add KinematicCharacterController.Gravity & MaxSlope. Fixes issue 63.

git-svn-id: http://bulletsharp.googlecode.com/svn/trunk@598 030a5c38-1ffe-11df-902a-156ec2e33ad3
Initial commit
fixes for double precision
add Move() for characters
Enable MINICL
Add IsEnabled for KinematicCharacter
Add Reset in RayResultCallback to allow reuse of object and avoid expensive reallocation/garbage.

Also added Set(ref from,ref to) for more efficient vector handling
expose CenterOfMassOffset
fix matrix math
delete root project (using only vs2013)
fix vs2013 solution paths