Added origin attribute to be appended to HTTP requests when using Browser based tokens.

Added static origin values for Azure portal client ID.

Updated checktoken function to use authenticate_with_refresh_native and v2 custom methods instead of Microsoft adal.

Corrected try and except statements

Modify expire time to utilize token values returned from authenticate_with_refresh_token_native functions.

Improvements to more efficiently handle adding "Origin" header to Single Page Application token refresh requests. Removed static client id, implemented a static header for adal when self.origin is set in Auth.py, updated checktoken function in gather.py to use adal authorization with refresh token instead of native, removed unnecessary comments.