make use of joint name to control joints independently. solves #40
updating ptu action server to use joint names
making PTU unit joint names parameterised
PTU action server using parameterised joint names
Merge pull request #42 from cburbridge/master

[PTU] Using joint names to select PTU joint for control. Solves #40
Merge branch 'master' of https://github.com/strands-project/scitos_drivers