v4.13.0

Description

This release adds end to end encryption as an option when starting a session.
Developers can now add custom user agent strings for API call tracking.

Under the good, the user agent is now dynamic, which was a feature originally pencilled as a TODO in 2014

What's Changed

• Add end-to-end encryption when creating session. by @SecondeJK in #327
• Custom User Agent by @SecondeJK in #328
• Dev release merge by @SecondeJK in #331

Full Changelog: 4.12.0...v4.13.0