Execution System

• Add a new execution system which allows to manage processing pipelines, delay and discard sources, and operate on sources from multiple threads (breaking a lot of backwards compatibility)
• Fix issues with FileSystemScheduler
• Improve documentation
• Improve public API
• Add more unit tests

Removing old dependencies

Old dependencies have been removed (e.g. Genius integration is now a project on its own).

Song matching integration

Merge pull request #7 from plainerman/feature-genius-integration

Feature genius integration

Initial version

The initial release for the easy to use data pipeline written in dotnet core 2.0.