Add scripts to package data in tar files for each scene

[peteflorence]

Don't merge yet -- just flagging this as coming soon

So far:

1. Script, called from a scene_dir, which tars only the derived labeled data for that scene
2. Script, called from a scene_dir, which tars only the raw log from a scene

Obviously missing a script to just iterate over all scenes, but the above are building blocks

Outstanding issue:

• *.ply and *.jlp/freiburg are making their way into the raw log one due to the file names. Should be changed

Once I fix the above will push to our data server, and provide scripts to iteratively download subsets of scenes