Make demo_assignment files contain only one global variable
Add stubs for Test serialization
Rewrite test loading in client to match new test format
Add TODOs in ok.py
Filter non-python test files in ok.py loading
Revert framework_tests to use actual filesystem
Change Protocol constructor parameters
Minor modifications to FileContentsProtocol
Merge branch 'master' into client-loading
Merge pull request #82 from Cal-CS-61A-Staff/client-loading

Rewrite client test loading