Joint space area calculations

(Liz Marai and Leor's notes for this process are at $G/src/jspBin/README.txt and $G/src/jspBin/trail_contact_areas.txt)

Follow these steps to compute the distance maps:

1. Get required data files into the data root directory
        1. get the bone Geomagic meshes in OpenInventor format (e.g., <bone_tag>.iv)
        2. get the "animation file" for each bone, (e.g., <bone_tag>_anim.RT)
        3. get anatomical coordinate system for each bone (e.g., <bone_tag>_coord.dat) 
2. Prepare scripts
        1. copy the "joints_one_linux" and "joints_linux" from $G/bin/jspBin/ to your data's top-level directory
        2. replace "set data_directory" lines in both with the path to your directory
        3. replace bone tags with the ones of interest (e.g., bone_tag_1=sca15L and bone_tag_2=lun15L)
        4. see further options at $G/src/jspBin/trail_contact_areas.txt 
3. Run scripts
        1. ./joints_one_linux
        2. ./joints_linux 

For more details, see $G/src/jspBin/README.txt and $G/src/jspBin/trail_contact_areas.txt.