Add UX version support and support for template/files.

3.3.0

Add ux_version parameter to requests. Add template/files support.

Fixes an NPE in HelloSignClient.

This release fixes a null pointer exception in the HelloSigClient when certain optional system properties are not set.

Added API app CRUD endpoints.

Support for new endpoints is here!

https://www.hellosign.com/api/reference#ApiApp

3.1.6

Fixes a NPE when accessing Template.isEmbedded().

Add ability to include pre-existing fields in PDFs, update documentation.

3.1.4

Add pre-existing field parameter for template draft creation.

Add embedded templates, update demos, fix bugs.

This update provides new endpoints for HelloSign embedded template features (create, request, delete, edit), as well as an overhaul of the demos.