Added acceleration member to base/JointState. Added unit tests.
Fixed the mess from previous commit. Updated test case.
Updated base/JointLimitRange and base/samples/Joints to comply with changes made in base/JointState
Merge branch 'master' of git://github.com/rock-core/base-types
Adapt ruby bindings to changes in base/JointState.
Merge pull request #19 from dmronga/master

Added acceleration member to base/JointState. Added unit tests.