Fixes an issue with authentication returning an invalid token due to unspecified origin header.

Fixes #1 where the limit of items was set to 200. It will now iterate until all the items have been gathered.

This release adds the following features

• Cleaner import
• Tighter integration with Pandas to allow better data clean-up from Graph API
• Titles for Pandas columns are pulled from the API rather than using the auto-generated API field names.
• Early stage write access with update_rows(). This feature in particular may be unstable.

This is an early release beta version. Not recommended for production.

Features include:

• Authentication with Azure AD SSO
• Retrival of SharePoint List Items
• Token Caching