Fixed ParallelEventProcessing system.

This version adds the ParallelEventProcessor feature.

• Some bug corrected in the statistics collection
• Better batching using sdskv_put_packed

Use sdskv_put_packed for batching.

Adds prefetching capabilities.

• AsyncEngine now available
• WriteBatch adapted to use AsyncEngine
• Complete refactoring of internal implementation using shared pointers
• Complete reorganization of database system and formats
• New configuration format

• Adds WriteBatch feature

Added the possibility to use multiple threads, multiple providers per node, and multiple targets per provider.

Added exceptions everywhere to make code more safe.

Added basic support for Ptr class.

This version adds the following features:

• Support for BAKE
• Server-side configuration based on a YAML file
• Ability to restart

• Corrected a problem with the generated cmake target
• Added support for path-like retrieval of DataSets