Refactor Timer
ReRefactor Timer
Remove Skeleton::mRootBodyNode and assume that Skeleton::mBodyNodes[0] is the root.
Clean up Skeleton.
Merge pull request #93 from dartsim/root_body_node

Remove Skeleton::mRootBodyNode and assume that Skeleton::mBodyNodes[0] i...
Merge pull request #91 from dartsim/timer

Refactor Timer
Add drop_test.skel.
SkelParser can parse multiple shapes.
Add double_pendulum_with_base.skel
Test double_pendulum_with_base.skel in testBed app
Merge branch 'origin/master'

Conflicts:
	apps/testBed/Main.cpp
Fix double_pendulum_with_base.skel.
Starting FCL + customized primitive collision + broad phase (need a lot refactoring)