moved isSimulating flag to SimWindow
improved lemke algorithm for solving LCP
Add variable initialization code for mSimulating in SimWindow class.
changed name: skeletonDynamics::getQDotVector() -> skeletonDynamics::getPoseVelocity(). So now skeleton has getPose() and getPoseVelocity() two functions
merged
added two apps for tutorial session
Fix  Issue #57.
removed activity1 and activity2
delete autosaved header files
Delete deprecated apps (activity1, activity2) in CMakeLists.txt
Create 'math' namespace and moves 'EigenHelper', 'UtilsMath', and 'UtilsRotation' to 'math' namespace.
Create 'math' namespace and moves 'EigenHelper', 'UtilsMath', and 'UtilsRotation' to 'math' namespace.
Fix build errors from change namespace from utils to math.
Change defines of headers in math namespace.
add testCollision.
Remove failed tests in testCollision. (the tests are in 'fcl_primitive_collision_test' branch now).
Re-add previously failed tests in testCollision since the tests succeed with the newest FCL version
Remove robotics::World and robotics::Robot

Use simulation::World and dynamics::SkeletonDynamics instead.
Add ShapeSphere.
Create collision detectior interface.
Add new fcl collition detector. (mesh and primitives)
Keep old fcl collision detector. (always mesh-mesh)