Blocks implementation
Created by: thomasduhamel
Add the blocks system to the JSON configuration files, with a default block that can:
- Add its trials to the block if specified;
- Add its estimations to the block if specified;
- Specify meta-properties of the block if they're missing from it.
Note for myself: we're gonna need a proper documentation very soon, while the code is documented, the intentions might be getting more and more hard to get for other people.