* Variables are now stored including their type name for automatic deserialization into their actual type. This is important for use in expressions.
* **SplitObject** and **ExecuteMethod** now use workflow expressions instead of variable names. This allows for more flexibility.
* Improved **Join** activity to allow proper function within looping constructs.
* Improved Variables performance. Variables are no longer serialized/deserialized upon writing/reading perspectively, only when the workflow instance is persisted.
* Fix StringValues serialization and rename WorkflowDefinition to WorkflowDefinitionVersion
* Fix Singleton issue and add support for absolute URL using base URL for background tasks
* Fix persistence and lifetime scope issues
* Fix timer bugs
* Various bug fixes
* Removed cruft
* Consolidated activity driver with activity
* Incremental work on serialization
* Incremental work on serialization
* WIP
* Incremental work on strongly typed defined workflows
* Removed old samples and added new ones
* Updated primitives and improved workflow builder API
* WIP (broken)
* Coded workflow API improvements
* Fixed Email and Http libraries
* Fixed start activity issue