[parser] Update to latest schema and add large file goodies.

[kumpera]

The two large file improvements are: --short and --summary.

--short: produce a one line message per event. --summary: print one line per checkpoint message.

[cheng-tan]

Do we want to have the joiner.py produce checkpoints or is that something we will skip?

I'm updating RewardFunctionInfo to CheckpointInfo and add in the config of learning mode and problem type. I can update the joiner.py, it will be needed for the unit test files.