This makes dynamic-graph-bridge-v3 compiles on 16.04 LTS.

This is necessary to include tf in the library to be linked with.

Add proper dependence to the SoT packages.

with filling sensor, control computation and sending control.

Integrate bug fixed in robotpkg.

A sot plugin should be installed in lib/plugin.

  pc file is generated both by catkin and by cmake module. Keep both up to date
  for security.

generated by catkin.
Update package.xml accordingly (i.e. cpp export is obsolete)