[baxter_moveit_config] add OMPL + CHOMP pipeline launch

[knorth55]

depends on moveit 1.0.2
add ompl_chomp as OMPL + CHOMP pipeline launch.
see https://ros-planning.github.io/moveit_tutorials/doc/planning_adapters/planning_adapters_tutorial.html#running-ompl-as-a-pre-processor-for-chomp

[rhaschke]

I'm not sure we want to merge all kinds of configuration variations for specific users.
These configs are basic examples only and you are responsible to handle your very own one yourself.
Other opinions?

[knorth55]

I can understand your point.
But I think it is good for users to have many example launches or sample launches, and try them easily.
As I mentioned in #78 (comment),
I think it is user-frindly to switch many moveit options by roslaunch args and try options from command line.
(However, I believe there would be some more user-frindly interface for samples than command line.)
This repo is for baxter moveit config, so it might be not good to add samples.
What do you think?