Closed Feature: Update : [code/unity] Migrate application design to use Unity for IoC [1691]

Implement Unity and Dependency injection to enable the development of Unit Tests as Tweetinvi currently only have Integration tests.
Comments: Resolved with changeset 33306: Version 0.9.0.0
- Implemented GetSavedSearch from Id
- Implemented GetSavedSearch JSON
- Impltemented DestroySavedSearch from Id
- Impltemented DestroySavedSearch JSON