Blurr

- Fixed jupyter notebook example

- Updated BTS YAML file validation.
- Added support to load a previous state in the Runners.
- Removed Split from Block Aggregate. Dimensions are now supported and can be used for creating id based Block aggregate splits.
- Renamed DTC (Data Transformation Config) to BTS (Blurr Transformation Spec).
- Added support for loading BTS files from S3 in the Runners.

- Added basic DynamoDB support
- Updated documentation
- Added a Type class
- Bug fixes
- Spark performance improvement with Generators

* Added support to import custom code.
* Added dimensions support to IdentityAggregate.
* Increased test coverage.
* Renaming & refactoring.
* Bug fixes.