Log Message:
py-ntlm-auth: updated to 1.5.0

1.5.0:
* Added the `mic_present` property to the `NtlmContext` class to determine if a \ 
MIC has been added to the authentication message.
* Added the `sign` and `verify` function to the `NtlmContext` to sign data and \ 
verify signatures.
* Added the `reset_rc4_state` function to the `NtlmContext` to allow a caller to \ 
reset the incoming and outgoing RC4 cipher.
* Added the `NTLMSSP_NEGOTIATE_UNICODE` flag to the negotiate message to ensure \ 
the challenge and authentication message's text fields can be unicode encoded