changes for codalab website

The biggest change here is adding interpret_items_and_file_genpaths to the remote bundle client. 
With this commit on codalab site. 
https://github.com/codalab/codalab/commit/cbc80b14f6c4eee8ff0f9b4e9a70d12e4fca6e1e

This allows a single call to client via RPC to interpret items and any file paths and other things that the client might need to do. 

Also a deep copy on bundle_infos so that each item has ref to it's metadata. Was returning blank before to codalab site. 
it is bundle info on everyother case, This makes syncing it with the front end javascript easier. Then handling the one off infoS