Release: v5.0.0

- Support new Recommend Items to Item Segment endpoint
- Series API improvements:
	- Add Series endpoint creates associated Item for the Series automatically (based on the cascadeCreate parameter)
	- Breaking change: Remove From Series no longer requires the time parameter
- Removed deprecated Groups endpoints

Support Item Segmentations

Support setting the region of your DB. Added Update / Delete More Ite…

…ms endpoints.

Removed deprecated endpoints Item Based Recommendation and User Based Recommendation.

Support endpoints for handling search synonyms

Support RecommendNextItems endpoint

Avoid possible deadlock in synchronous Send using WaitAndUnwrapExcept…

…ion from Nito.AsyncEx

Support SearchItems endpoint

Support for asynchronous send (SendAsync method). Based on fork by @n…

…adjibus.

Fix #4. Update Newtonsoft.Json and serialize to camelCase only Bindin…

…gs classes.

Add logic parameter to recommendation endpoints. Use HTTPS as default.