Merge pull request #173 from snordt/master

updated DARPA office json files
adding GRAPHS program
adding GRAPHS and RP
fixing RP json
Dave edits from 7/24
removing MADCAT & RATS software entries
switch from py-sdm to replacement skl-groups
Merge pull request #174 from dougalsutherland/patch-1

switch XDATA catalog entry from py-sdm to replacement skl-groups
Update igraph description, inst. material
Merge pull request #175 from igraph/master

Update igraph description, inst. material
Remove CrossCat from catalog

Removed crosscat project. Crosscat and bayesdb are redundant. We only maintain docs for BayesDB.
Update XDATA-software.json

Updated Drapers Instructional Material and Software name
Add Tyler Palsulich as a contributor for JPL.
Add instructional material for JPL projects.
Merge pull request #178 from tpalsulich/master

Update JPL Project Info
Merge pull request #177 from dvreed77/patch-1

Update XDATA-software.json
Merge pull request #176 from BaxterEaves/patch-1

Remove CrossCat from catalog
USC - Documentation
Merge pull request #179 from charithwiki/patch-1

USC - Documentation
added office to schema