Use of StringStream in new "GetAllIK" Function

[Jmeyer1292]

So I've been building the software on the Descartes side necessary to interface with the changes in #57 and it's Jade equivalent.

One of the debug statements is built from a std::stringstream, and in an optimized build of a workspace, running on a representative problem, this stringstream is eating more than 60% of the runtime involved with the IK calls.

All of this for:

ROS_DEBUG_NAMED("ikfast","Sol %d: %s", s, ss.str().c_str());

[davetcoleman]

woa, good find!!

[gavanderhoorn]

Keeping this open until fe8e790 is cherry-picked into indigo-devel as well.