Changes to khanload, to stamp props directly onto topic tree.
Additions to topics.json (knowledge map json files can be removed, but will remove only after migrating interface code)
Updates to use new schema (and do translations).  Faster & cleaner, but far from perfect...
Remove old map / topicdata--no longer necessary!
Rename some props to reflect the more generic nature of the knowledge map.  Clean off some unused properties.
Cleaned topic tree
Code for using cleaned topic tree, with comments.
Removing non-live and hidden nodes from topic tree, making sure all unused attributes are cleaned, adding more debug info & comments.
"live" removed from the topic tree
Merge pull request #1263 from bcipolli/kmap_from_topics

translatable knowledge map, generated from the topic tree