[visualization_tutorial] Add trajectory slider

[130s]

I believe how to use moveit/moveit#491 isn't documented anywhere yet (took me awhile to figure it out).

Should be portable to indigo-devel. In fact I took the snapshot on Indigo.

[v4hn]

@130s testing failed

[130s]

https://travis-ci.org/ros-planning/moveit_tutorials/builds/242549355#L976

The command "sphinx-build -W -b html . native_build" exited with 1.
0.19s$ rosdoc_lite -o build .
Traceback (most recent call last):
  File "/opt/ros/indigo/bin/rosdoc_lite", line 37, in <module>
    rosdoc_lite.main()
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rosdoc_lite/__init__.py", line 225, in main
    pkg_desc = get_pkg_desc(path)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rosdoc_lite/__init__.py", line 241, in get_pkg_desc
    pkg_desc = packages.parse_package(path)
AttributeError: 'module' object has no attribute 'parse_package'

I think this is related to changes somewhere upstream and in rosdoc_lite it's already addressed (e.g. ros-infrastructure/rosdoc_lite#74) but its new version that includes the fixes are not yet synced for Indigo as of today. Indigo sync happened 2 weeks ago so hopefully next sync will be made soon. Then we can restart the CI job.

[v4hn]

Oh, it's two errors then. I didn't see the one you pointed out :D

I saw only the other one at first glance:

/home/travis/build/ros-planning/moveit_tutorials/doc/ros_visualization/visualization_tutorial.rst:168: WARNING: Inline interpreted text or phrase reference start-string without end-string.

[130s]

@v4hn Thanks for catching that. Now it should be fixed.

For rosdoc_lite, I asked for when's the next sync.

[v4hn]

I don't want to have this hanging here until upstream fixed the package, so I'll merge it.

[davetcoleman]

Great documentation, thanks!

[130s]

Ported to indigo-devel 5a3816b