fixes to improve demos a bit
add missing file
rename files, fix Linux build
more fixes towards working convex-convex, in case of (too) many edge-edge cases:
1) sample directions over a unit sphere and
2) add a contact, using mpr
add missing bullet.pc.cmake file (for old Bullet 2.x)
fix error due to rename b3RigidBodyCL -> b3RigidBodyData
Merge branch 'master' of http://github.com/kalesony/bullet3
add MultiDofDemo (Featherstone 3DOF spherical joint)
minor prettify of BasicDemo,RagdollDemo.
require 'multiDof' argument in btMultiBody.h (not default=false)
Update readme.txt

note about merging Bullet 2.x into Bullet 3.
Update readme.txt

note about Bullet2 into Bullet3 merge.
Update readme.txt